RT Journal Article SR Electronic T1 The ageing surgeon JF BMJ Quality & Safety JO BMJ Qual Saf FD BMJ Publishing Group Ltd SP 95 OP 97 DO 10.1136/bmjqs-2019-009739 VO 29 IS 2 A1 Kurek, Natalia A1 Darzi, Ara YR 2020 UL http://qualitysafety.bmj.com/content/29/2/95.abstract AB