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Sources 

  • Mayo Clinic: Gastric bypass: Is this weight-loss surgery for you? http://www.mayoclinic.com/health/gastric-bypass/HQ01465
  • CDC: Overweight and Obesity http://www.cdc.gov/nccdphp/dnpa/obesity/
  • WebMD: Gastric Bypass Surgery http://www.webmd.com/diet/gastric-bypass-operations
  • WebMD: Weight Loss Surgery Fast Facts ­http://www.webmd.com/a-to-z-guides/weight-loss-surgery-fast-facts
  • NIDDK: Gastrointestinal Surgery for Severe Obesity http://www.win.niddk.nih.gov/publications/gastric.htm#normaldigest