RT Journal Article SR Electronic T1 Frailty and mortality: ‘Same-same but Different’ JF BMJ Quality & Safety JO BMJ Qual Saf FD BMJ Publishing Group Ltd SP bmjqs-2018-008821 DO 10.1136/bmjqs-2018-008821 A1 Sei J Lee YR 2019 UL http://qualitysafety.bmj.com/content/early/2019/01/02/bmjqs-2018-008821.abstract AB