Dr Avinash Tank, Obesity, Metabolic & Gastro Surgeon, Ahmedabad, India I Metabolic Surgery, Diabetes Surgery, Ahmedabad, India I Sleeve gastrectomy, Gastric bypass, Banded bypass, Mini-bypass, Bilio-pancreatic diversion (BPD), Metabolic surgery, Ahmedabad, India I Metabolic Surgeon, Diabetes Surgeon, Obesity Surgeon, Bariatric Surgeon Ahmedabad, India I Diabetes Hospital, Ahmedabad, India