Dr. David Provost Visits India to Teach Latest Bariatric Surgery Techniques gwhqadmin May 3, 2012 Breaking WLS News 1 Comment Dr. David Provost, faculty advisor for the Weight Loss Surgery Channel and ASMBS Executive Council member, last week traveled to Hyderabad, India to educate local surgeons on the latest bariatric procedures. As a featured presenter, Dr. Provost performed four sleeve gastrectomy surgeries and one gastric bypass revision surgery.