RT Journal Article SR Electronic T1 Weekend effect: complex metric for a complex pathway JF BMJ Quality & Safety JO BMJ Qual Saf FD BMJ Publishing Group Ltd SP 525 OP 527 DO 10.1136/bmjqs-2019-010497 VO 29 IS 7 A1 Julian Bion YR 2020 UL http://qualitysafety.bmj.com/content/29/7/525.abstract AB