There are four retrospective cohort studies assessing mostly early outcomes after converting ARS to RYGB. First, Sarr et al analyzed 19 patients that underwent open conversion to RYGB. Next, Ikramuddin et al described the anatomic findings for fundoplication failure after the laparoscopic conversion to RYGB of 11 patients. Lastly, with seven patients each, Raftopoulos et al and Donnelly et al reported feasibility with a high morbidity rate as well.