A search by Pubmed, PsycInfo and Scopus was conducted using the terms Roux-en-Y anastamosis and obesity, bariatric surgery, obesity surgery, gastric bypass, gastroplasty, jejunoileal bypass and lipectomy. We combined these terms with BED, BE, bulimia nervosa and LOC. Dates searched began in April 2013 and ranged back to 1954 for PsycInfo, 1966 for Pubmed and no limits were used for Scopus. The study selection is shown in Figure 1.