“…†Non-North American study. , 18 studies 32,33,36 -39,41-43,45-47,50-55 reported postoperative complications (for example any complications, graft failure, stroke, wound infection), and 11 studies32,38,39,42,44,47,50,51,54,56,57 reported hospital or ICU length of stay. One other reported outcome was functional status…”