(2019-04) Ablett, Andrew D.; Browning, Aimee; Quan, Vincent; Tay, Hui S.; McCormack, Caroline; Carter, Ben; Hewitt, Jonathan; Myint, Phyo K.; Older Persons Surgical Outcomes Collaboration (OPSOC); University of Aberdeen.Applied Medicine; University of Aberdeen.Other Applied Health Sciences; University of Aberdeen.Institute of Applied Health Sciences