Jill Tucker, RN says:

“Advances in technology are making surgical procedures faster, less invasive, with the long-term results easier to predict. Considering the high price of a surgical procedure, as well as the time and the potential discomfort, knowing what you are getting after an operation is knowledge that is invaluable.”
Gene Test May Help Predict Success of Weight-Loss Surgery

US News & World Report  May 2, 2013