Bariatric Surgery Market Segmentation by Procedure (Adjustable Gastric Banding, Gastric Bypass, Biliopancreatic Diversion with Duodenal Switch, and Gastric Sleeve Surgery); by Devices (Assisting Devices and Implantable Devices); by End-user (Bariatric Surgery Clinics, Hospitals, and Ambulatory Surgical Centers) – Global Demand Analysis & Opportunity Outlook 2031