RT Journal Article SR Electronic T1 “Four weddings and …” JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E166 OP E167 DO 10.1503/cmaj.181404 VO 191 IS 6 A1 Kearon, Clive YR 2019 UL http://www.cmaj.ca/content/191/6/E166.abstract