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