RT Journal Article SR Electronic T1 Identical strangers JF Postgraduate Medical Journal JO Postgrad Med J FD The Fellowship of Postgraduate Medicine SP 59 OP 60 DO 10.1136/postgradmedj-2019-137194 VO 96 IS 1131 A1 Launer, John YR 2020 UL http://pmj.bmj.com/content/96/1131/59.abstract AB