Surgery News : Surgery History



06-21-2006 05-22-2006 04-12-2006 03-05-2006 02-08-2006 12-19-2005 11-12-2005

07/25/2006 Rep. Harris says she is cancer-free
07/25/2006 Complex heart surgery performed on 8-month old Egyptian baby
07/25/2006 Weight-loss surgery could lead to complications
07/25/2006 Mayor's Wife To Undergo Breast Cancer Surgery
07/25/2006 Over 50% of Crohn's Patients Claim To Have Had Surgery
07/24/2006 Complications Follow Obesity Surgery
07/24/2006 Pavarotti vows to return to the stage despite surgery for pan
07/24/2006 Slowing a Speeding Heart New Surgery Option
07/24/2006 Nationals' Guillen Having Elbow Surgery
07/24/2006 Study Bariatric surgery is problematic
07/24/2006 Flintoff to undergo surgery on ankle
07/24/2006 Williams undergoes surgery on fractured arm
07/24/2006 Pavarotti vows to return to the stage despite surgery for pancreatic cancer
07/24/2006 40 pct obesity surgery patients develop complications, study
07/24/2006 Williams to have surgery Monday report
07/24/2006 Mainstream News Officials Cite Obesity Surgery Complications
07/24/2006 Williams needs surgery to repair broken arm
07/23/2006 Computers improve knee surgery outcomes
07/23/2006 Officials Cite Obesity Surgery Complications
07/23/2006 Weight-loss surgery issues are common, study finds
07/23/2006 Obese 'left waiting for surgery'
07/23/2006 Obese 'left waiting for surgery'
07/23/2006 Officials Cite Obesity Surgery Complications
07/22/2006 Foreigners owe for plastic surgery
07/22/2006 Sushil Koirala undergoes surgery
07/22/2006 Harris campaigns in TCoast days after surgery
07/22/2006 Former Spokane Mayor James West Dies of Complications From Cancer Surgery
07/22/2006 New German Scan Prevents Surgery on Art
07/22/2006 More Knee Surgery For NFL's Marshall Faulk
07/22/2006 Surgery could end Faulk's career
07/22/2006 NFL ROUNDUP Surgery could be last call for Faulk
07/22/2006 Ethnic plastic surgery grows popular as attitudes change
07/21/2006 Marshall Faulk to have knee surgery, and miss the entire 2006 season.
07/21/2006 Faulk to miss season with knee surgery; future uncertain
07/21/2006 NFL Faulk to miss season with knee surgery; future uncertain
07/21/2006 Faulk to miss season with knee surgery; future uncertain
07/21/2006 Faulk to Miss Season With Knee Surgery
07/21/2006 Python undergoes surgery after gulping electric blanket
07/21/2006 Surgical Facelift Results Now Possible Without Surgery
07/21/2006 Facial rejuvenation, including facelift, browlift, and laser surgery
07/20/2006 Thailand prays for king as he undergoes surgery
07/20/2006 Hi-tech boost for plastic surgery
07/20/2006 Michelle Pfeiffer 'can wait' on plastic surgery
07/20/2006 Surgery removes electric blanket from Idaho snake
07/20/2006 Surgery for blanket-eating python
07/20/2006 Hi-tech boost for plastic surgery
07/20/2006 Thailand prays for king as he undergoes surgery
07/20/2006 Virginia Congresswoman Undergoing 2nd Cancer Surgery
07/20/2006 Jennifer Aniston Obsessed With Doctors & Surgery
07/20/2006 Python has surgery after swallowing queen-size electric blanket
07/20/2006 Doctor wants weight-loss surgery center
07/20/2006 Thai king prepares for spinal surgery
07/20/2006 Python gets surgery after gulping queen-size electric blanket
07/19/2006 Snake gets surgery after gulping blanket
07/19/2006 Blanket-swallowing trick sends Houdini the python to surgery
07/19/2006 Nets' Boone undergoes successful surgery
07/19/2006 Surgery For Snake That Ate Its Bed
07/19/2006 Python gets surgery after gulping electric blanket
07/19/2006 Group Raising Funds for Dog's Surgery
07/19/2006 Nationals' Patterson to undergo surgery
07/19/2006 Pet Python Has Surgery After Eating Electric Blanket
07/19/2006 Huge pet snake has surgery after gulping down electric blanket
07/19/2006 Python gets surgery after gulping queen-size electric blanket
07/18/2006 Heart surgery survival rates are revealed for hospitals
07/18/2006 Brazilian Vice President undergoes surgery for tumor
07/18/2006 Pierce to have elbow surgery
07/18/2006 RFID-based system to track sponges left inside surgery patients
07/18/2006 Gastric-Bypass Surgery Best for Super Obese Study
07/18/2006 ID chips keep sponges out of surgery patients
07/17/2006 Wand could save surgery leftovers
07/17/2006 A new alternative to LASIK surgery
07/17/2006 Radio wand may help detect sponges left in surgery patients
07/17/2006 Mitral valve surgery may be safe option for elderly patients
07/17/2006 Yes, It Really Is Brain Surgery
07/17/2006 Surgical robot gives tech stock a shot in the arm
07/17/2006 Taking robot arms to the bank
07/17/2006 Gray Open To Surgery
07/17/2006 Rimes Cancels Dates For Leg Surgery
07/16/2006 New surgery could mend more broken hearts
07/16/2006 Grand Ole Opry star recuperating after surgery
07/16/2006 Lakers' Kobe Bryant Has Minor Knee Surgery
07/16/2006 Yes, It Really Is Brain Surgery
07/16/2006 Healthcare in Need of Major Surgery
07/15/2006 Rockefeller Reappears After Surgery
07/15/2006 Tesche out and about after heart surgery
07/15/2006 Grand Ole Opry star recuperating after surgery
07/15/2006 Lakers' Bryant has minor knee surgery
07/15/2006 Bryant Likely Out of Worlds After Surgery
07/15/2006 Brazil's Ronaldo Has Leg Surgery
07/15/2006 Extreme surgery to have a baby
07/15/2006 My surgery nightmare
07/15/2006 Kids exposed to second-hand smoke have complications during surgery
07/14/2006 Children Who Live With Smokers Have More Respiratory Complications During Surgery
07/14/2006 Gandolfini Surgery Stalls Final Sopranos Episodes
07/14/2006 Children who live with smokers have more respiratory complications during surgery
07/13/2006 http://www.pr-inside.com/rss/gandolfini-surgery-stalls-final-sopranos-episodes-r11452.htm
07/13/2006 B.C. NDP leader faces cancer surgery
07/13/2006 Tackle 'aesthetic' genital surgery in rich countries before criticizing traditional practices
07/13/2006 Patient lost leg after botched surgery
07/13/2006 Gandolfini's Knee Surgery Delays Final 'Sopranos' Season
07/13/2006 Gandolfini's Surgery Delays 'Sopranos' Final Season
07/13/2006 Surgery on hospital's main artery
07/12/2006 Makeover shows increase desire for surgery
07/12/2006 Celebrities fuel cosmetic surgery rise in UK
07/12/2006 LeAnn Rimes Recovers From Leg Surgery
07/12/2006 Leann Rimes Recovers From Surgery
07/12/2006 US singer Rimes has leg surgery
07/11/2006 Research backs preventive surgery
07/11/2006 LeAnn Rimes resting after surgery for infected leg
07/11/2006 LeAnn Rimes has surgery for infected leg
07/11/2006 LeAnn Rimes Undergoes Surgery For Infected Leg
07/11/2006 Flyers' Forsberg doesn't require second surgery
07/11/2006 Flyers Forsberg wont need second surgery
07/11/2006 LeAnn Rimes to have surgery for leg infection
07/11/2006 Singer Rimes Has Leg Infection, Undergoing Surgery
07/11/2006 LeAnn Rimes to undergo surgery and forced to cancel three concerts
07/11/2006 Plastic surgeon volunteers for mission of hope
07/10/2006 Senegal NBA forward Sow undergoes neck surgery
07/10/2006 LeAnn Rimes to undergo surgery for infected leg
07/10/2006 Man shot at football game recovering after surgery
07/10/2006 Rimes to Have Surgery for Leg Infection
07/10/2006 Hospital Says 1 Conjoined Twin Dies After Surgery
07/10/2006 Conjoined twin dies after surgery
07/10/2006 Benefits of surgery for lung cancer unclear
07/10/2006 The Risks and Reward of Gastric Bypass Surgery
07/10/2006 Chinese twin dies after separation surgery
07/10/2006 Twin Dies After Separation Surgery
07/10/2006 Movie Critic Ebert 'OK' After Surgery
07/10/2006 Hospital Says 1 Conjoined Twin Dies After Surgery
07/10/2006 Conjoined twin dies 4 days after surgery
07/10/2006 http://www.pr-inside.com/rss/curtis-chooses-turquoise-therapy-over-surgery-r10808.htm
07/10/2006 One of Chinese Conjoined Twins Dies Following Surgery
07/10/2006 Conjoined Twin Dies Days After Separation Surgery
07/10/2006 Hair Transplant Surgery May Be Too Risky To Try; Serious Problems Reported
07/10/2006 Laser Surgery Evolves at Dello Russo Laser Vision
07/10/2006 Conjoined Twin Dies Days After Separation Surgery, Other Twi
07/10/2006 Mainstream News Barbaro develops complications, undergoes surgery
07/10/2006 Barbaro undergoes surgery
07/10/2006 Concern as 12 teenagers get cosmetic surgery paid for by NHS
07/10/2006 Luciano Pavarotti recovering from pancreatic cancer surgery, his manager says
07/10/2006 Barbaro develops complications, has surgery
07/10/2006 Ebert 'doing OK' week after surgery
07/10/2006 Reporting data on heart surgery poses care risks
07/09/2006 Landiss Hip Will Need Surgery After Bid for Tour
07/09/2006 Barbaro has surgery after 'complications'
07/09/2006 Opera Tenor Pavarotti Undergoes Cancer Surgery
07/09/2006 Barbaro Has Surgery After 'Complications'
07/09/2006 Report finds elective surgery shortfall
07/09/2006 Landis to Have Hip Surgery After Tour
07/09/2006 No. 2 in Tour Confirms He Needs Hip Surgery
07/09/2006 Honey can help heal throat cancer patients after surgery
07/09/2006 Hair Transplant Surgery May Be Too Risky To Try; Serious Problems Reported
07/09/2006 Laser Surgery Evolves at Dello Russo Laser Vision
07/08/2006 Suspect Needs Re-constructive Surgery After Chase
07/08/2006 Ark. Official's Bone Marrow Surgery Fails
07/08/2006 Pavarotti has emergency cancer surgery
07/08/2006 Gagne Undergoes Season-Ending Back Surgery
07/08/2006 http://www.pr-inside.com/rss/pavarotti-recovering-following-cancer-surgery-r10655.htm
07/08/2006 Mounties in surgery after shooting
07/08/2006 Radiosurgery system
07/08/2006 More surgery for Gagne
07/08/2006 Katherine Harris to have surgery
07/08/2006 Eric Gagne To Have Back Surgery
07/08/2006 Pavarotti, 70, has surgery for cancer
07/08/2006 Pavarotti, 70, has surgery for cancer
07/07/2006 Pavarotti has surgery for cancer
07/07/2006 Gagne to have season-ending surgery
07/07/2006 Back surgery derails Gagne's season
07/07/2006 Emergency cancer surgery halts Pavarotti world tour
07/07/2006 Rep. Katherine Harris to Have Surgery
07/07/2006 Cancer surgery for Pavarotti
07/07/2006 Bonobo Dies Before Surgery
07/07/2006 Pavarotti recovering after cancer surgery
07/07/2006 Harris to have surgery on ovarian mass
07/07/2006 Maureen's Medical Moment Pavarotti recovering from cancer surgery
07/07/2006 Conjoined Twins Stable After Surgery
07/07/2006 News Pavarotti recovering from cancer surgery
07/07/2006 DM ape P-Suke dies before surgery
07/07/2006 Tenor Luciano Pavarotti has cancer surgery
07/07/2006 Barbaro Closely Monitored After Surgery
07/07/2006 Pavarotti undergoes cancer surgery in New York
07/07/2006 Pavarotti Undergoes Cancer Surgery
07/07/2006 Ape surgery called off
07/07/2006 Pavarotti recovering after cancer surgery
07/07/2006 Fort Dix Soldiers Get Free Laser Eye Surgery from Dr Joseph Dello Russo
07/07/2006 Briefly Pavarotti recuperating from cancer surgery
07/07/2006 Luciano Pavarotti Recovering From Surgery
07/07/2006 Gagne could be headed for back surgery
07/07/2006 Pavarotti 'recovering well' after cancer surgery
07/07/2006 Baby gets state-mandated dialysis surgery
07/07/2006 Pavarotti Undergoes Surgery
07/07/2006 Luciano Pavarotti Recovering From Pancreatic Cancer Surgery
07/07/2006 Update Amber Alert Infant Has Surgery
07/07/2006 Luciano Pavarotti recovering from pancreatic cancer surgery, his manager says
07/07/2006 Pavarotti cancels tours after surgery for cancer
07/07/2006 Ronaldo to have minor knee surgery
07/07/2006 New Method Gauges Weight-Loss Surgery Risk
07/07/2006 Pavarotti recovering from cancer surgery, manager says
07/07/2006 Pavarotti has pancreatic cancer surgery
07/07/2006 Cardiff wins brain surgery centre
07/07/2006 Tenor Pavarotti has cancer surgery
07/07/2006 Cancer surgery for star Pavarotti
07/07/2006 Luciano Pavarotti Recovering From Cancer Surgery
07/07/2006 Pavarotti recovering from cancer surgery
07/07/2006 Baby gets state-mandated dialysis surgery
07/07/2006 New Beauty Magazine The Best in Plastic Surgery From Raleigh to Beverly Hills
07/06/2006 Brain surgery site decision due
07/06/2006 West Virginia's governor goes under the knife this weekend for knee replacement surgery
07/06/2006 Dodgers' Gagne Might Need Back Surgery
07/06/2006 Bonobo at Great Ape Trust to Undergo Surgery
07/06/2006 http://www.pr-inside.com/rss/elle-macpherson-is-scared-of-getting-plastic-surgery-r10440.htm
07/06/2006 27-Year-Old Bonobo Ape to Undergo Surgery
07/06/2006 Pre-Surgery Chemo Helps Stomach Cancer Patients, Study Finds
07/06/2006 Witnesses Say Peace Activist Laughed After Attack, Victim in Coma Following Brain Surgery
07/06/2006 Football Surgery wait for Owen
07/06/2006 Rare spinal surgery on Ottawa girl declared a success
07/06/2006 Eight-week surgery wait for Owen
07/06/2006 Doctors conduct surgery to separate conjoined twin girls
07/06/2006 24-hour surgery to save Chinese twins
07/06/2006 Eight-week surgery wait for Owen
07/06/2006 Devil Rays' Walker to have Tommy John surgery
07/06/2006 Oxford commissioner to undergo heart surgery
07/06/2006 Briefs Sadaharu Oh to have stomach surgery
07/05/2006 Op-Ed Contributor Surgery With a Side of Fries
07/05/2006 Reed to have surgery, will miss eight weeks
07/05/2006 Vet In Induced Coma After Surgery For Fireworks Injury
07/05/2006 Jeremy Reed out 8 weeks for surgery
07/05/2006 Tyler Walker Has Elbow Surgery
07/05/2006 Chemotherapy before surgery can help stomach cancer patients, study finds
07/05/2006 Seattle's Reed Will Have Thumb Surgery
07/05/2006 Nine Tasmanians die waiting for heart surgery
07/05/2006 New Therapy After Joint Replacement Surgery
07/05/2006 Marsha Barbour returns home after spinal surgery
07/05/2006 Drugs before surgery improve stomach cancer survival
07/05/2006 Plastic Surgery With A Friend?
07/05/2006 Ebert Doing Well After Emergency Surgery
07/05/2006 More People Getting Plastic Surgery With a Partner
07/05/2006 French Doctors Publish New Details of Partial Face Transplant Surgery
07/05/2006 Ronaldo may have knee surgery
07/05/2006 Oldham surgery squabble center
07/04/2006 Surgery helps girl, show's U.S. heart
07/04/2006 Prideaux has successful surgery
07/04/2006 AMA concerned at elective surgery cancellation
07/04/2006 Heart surgery data may go public
07/04/2006 Duke cuts into surgery centre
07/03/2006 Hasselhoff Recovering After Emergency Surgery
07/03/2006 Movie Critic Ebert Has Emergency Surgery
07/03/2006 O'Grady leaves hospital after heart surgery
07/03/2006 Roger Ebert In Serious Condition After Cancer Surgery
07/03/2006 The film critic is in serious but stable condition after undergoing surgery.
07/03/2006 Man In Surgery After I-580 Shooting
07/03/2006 Film critic Ebert stable after emergency surgery
07/03/2006 Movie Critic Roger Ebert Stable After Surgery
07/03/2006 Critic Ebert in serious condition after surgery
07/03/2006 Entertainment Roger Ebert-Emergency Surgery
07/03/2006 Film critic Roger Ebert's wife reports he's doing well after surgery
07/03/2006 Brain Surgery Without The Surgery?
07/03/2006 David Hasselhoff Has Emergency Surgery
07/03/2006 Ebert In Serious Condition After Surgery
07/03/2006 Film critic Roger Ebert has emergency surgery
07/03/2006 Ebert in serious condition after emergency surgery
07/03/2006 Ebert undergoes emergency surgery
07/03/2006 Movie critic Roger Ebert condition serious after surgery
07/03/2006 Roger Ebert Undergoes Emergency Surgery
07/03/2006 Launch of Plasmetic, a new Plastic Surgery, Cosmetic Surgery blog
07/02/2006 Roger Ebert Stable After Surgery
07/02/2006 Movie critic Ebert stable after surgery
07/02/2006 Roger Ebert hospitalized after cancer-related surgery
07/02/2006 Gorilla Kuja of U.S. National Zoo dies in surgery
07/02/2006 Ebert in serious condition after surgery
07/02/2006 Movie critic Roger Ebert has emergency surgery
07/02/2006 Da Vinci Robot Best Choice For Prostate Surgery?
07/02/2006 Roger Ebert in serious condition after surgery
07/02/2006 7/7 victims are bionic surgery pioneers
07/02/2006 Ebert in serious condition following surgery
07/02/2006 National Zoo gorilla dies in surgery
07/02/2006 Roger Ebert In Serious Condition Following Surgery
07/02/2006 Film critic Roger Ebert undergoes emergency surgery
07/02/2006 Roger Ebert in Serious Condition After Emergency Surgery
07/02/2006 Movie critic Ebert has emergency surgery
07/02/2006 Film critic Ebert undergoes emergency surgery
07/02/2006 Roger Ebert Undergoes Emergency Surgery
07/02/2006 Roger Ebert recovering after emergency surgery
07/02/2006 http://www.pr-inside.com/rss/hasselhoff-recovering-after-emergency-surgery-r9937.htm
07/02/2006 Heart surgery patient gets help from co-workers
07/02/2006 Surgery can help reduce obesity-related problems
07/02/2006 Zoo gorilla dies during surgery
07/01/2006 Washington Zoo gorilla dies during surgery
07/01/2006 National Zoo gorilla dies during heart surgery
07/01/2006 Gorilla dies during heart surgery at Washington zoo
07/01/2006 National Zoo Gorilla Dies During Surgery
07/01/2006 Baby Riley recovering from surgery
07/01/2006 Baby undergoes surgery despite mom's worries
07/01/2006 Judge refuses appeal to block surgery for boy
07/01/2006 Judge says no to plea; baby has surgery
07/01/2006 Riley undergoes surgery at Children's
06/30/2006 Pomegranate juice slows PSA acceleration rate after prostate cancer surgery, radiation
06/30/2006 Ailing baby that was focus of Amber Alert finally has surgery
06/30/2006 Ailing Baby Has Surgery Mother Sought To Block
06/30/2006 Lubbock Woman Warns People About LASIK Surgery
06/30/2006 Judge refuses to block surgery for Sumner woman’s son
06/30/2006 David Hasselhoff Undergoes Surgery
06/30/2006 Weight Loss Surgery Halves Heart Risk
06/30/2006 Weight Loss Surgery Halves Heart Risk
06/30/2006 Hasselhoff Has Surgery After Gym Accident
06/30/2006 Mother loses fight to stop son's surgery
06/30/2006 Judge refuses to halt surgery for ailing infant
06/30/2006 Freak accident sends Hasselhoff to surgery
06/30/2006 http://www.pr-inside.com/rss/david-hasselhoff-is-having-emergency-surgery-after-slicing-his-hand-open-in-a-bizarre-shaving-r9826.htm
06/30/2006 Brain Surgery Doesn't Have To Be 'Brain Surgery'
06/30/2006 Mother loses fight to stop son's surgery
06/30/2006 Carlsen seeking to stop surgery for son
06/30/2006 Abducted Baby Set For Surgery
06/29/2006 Surgery-seekers set sights overseas
06/29/2006 Strahan Said To Have Had Plastic Surgery
06/29/2006 AllMed Healthcare Da Vinci Robot Best Choice For Prostate Surgery?
06/29/2006 Heart Surgery a Success for Numminen
06/29/2006 Stomach surgery can help obese teenagers study
06/29/2006 Minnesota Hospital Performs Brain Surgery on Internet
06/29/2006 New scoring system predicts gastric bypass surgery risk
06/29/2006 Two-day old child undergoes successful open-heart surgery
06/28/2006 Infant has returned to Iraq after receiving surgery in US
06/28/2006 Kenya Boy mauled by dogs has face surgery
06/28/2006 Marsha Barbour 'recovering well' from spinal surgery
06/28/2006 Invention 'to improve surgery'
06/28/2006 Culbreath has emergency surgery
06/28/2006 Grant recovers after surgery
06/28/2006 Gammons has brain surgery
06/28/2006 Judge gives OK for baby surgery
06/28/2006 Invention aims to improve surgery
06/28/2006 Invention to improve surgery
06/28/2006 The Importance of Having an Accurate Medical History for Plastic Surgery
06/28/2006 Globe Trotting GYN Surgeon Thomas L. Lyons, MD, Donates Time as Laparoscopic Surgery Mentor
06/27/2006 Marsha Barbour undergoes spinal surgery in California
06/27/2006 Invention aims to boost surgery
06/27/2006 Heart Surgery May Lead to Depression
06/27/2006 Smith Travel for cheap surgery raises questions
06/27/2006 Tacoma judge orders surgery for baby over mother's objection
06/27/2006 Gaza beach blast survivors treated in Egypt
06/27/2006 Kenyan boy going home with guardians after surgery
06/27/2006 Baby Riley to have surgery
06/27/2006 Is mom a criminal for not allowing surgery on her son?
06/26/2006 New cardiac MRI pinpoints closed arteries without surgery
06/26/2006 Team approach to rare cardiovascular, renal surgery at UT Southwestern provides impressive results
06/26/2006 Orthopaedic surgery waiting lists targeted
06/26/2006 Judge Orders Doctors To Proceed With Toddler's Surgery
06/26/2006 Private GP surgery criticised in Liverpool
06/26/2006 N Cape premier undergoes major surgery
06/26/2006 Daniel recovering after marathon surgery
06/26/2006 Racing Dye stable after surgery
06/25/2006 Brain surgery for Australian jockey Shane Dye
06/25/2006 Detective in surgery after attack
06/25/2006 http://www.pr-inside.com/rss/s-w-a-t-star-ll-cool-j-has-branded-people-who-have-plastic-surgery-cheats-r9117.htm
06/25/2006 Relaxed Inglis faces more painful surgery
06/25/2006 Dye has brain surgery after race fall
06/24/2006 Baby taken from hospital to avoid surgery
06/24/2006 Denver's Top Internet Marketing Firm Takes on a Denver Plastic Surgery Client
06/23/2006 Chinese doctors perform rare surgery on boy
06/23/2006 Iraqi youths set to leave Burlco after surgery
06/23/2006 Maureen's Medical Moment Roadmaps to surgery
06/23/2006 Small Device Helps Avoid Big Surgery
06/23/2006 LL Cool J Brands People Who Have Plastic Surgery "Cheats"
06/23/2006 LL Cool J Denies Using Steroids And Surgery To Stay Fit
06/23/2006 Nepal PM released from Bangkok hospital after surgery
06/22/2006 Minimally invasive surgery safer for joint replacement
06/22/2006 Sobota undergoes successful surgery
06/22/2006 Surgery on boy's unprotected heart
06/22/2006 Peel on course following surgery
06/21/2006 Older blood associated with worse outcomes after repeat heart surgery
06/21/2006 Girl attacked by pit bull undergoes more surgery
06/21/2006 Preventing spinal cord injury during aortic surgery
06/21/2006 Blog Surgery at UF saves beloved service dog
06/21/2006 Amaya Hess Undergoes Third Surgery
06/21/2006 Navy sees problems in popular eye surgery
06/21/2006 11 cousins undergo radical stomach surgery