RT Journal Article SR Electronic T1 International normalized ratio and activated partial thromboplastin time testing JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E1135 OP E1135 DO 10.1503/cmaj.220629 VO 194 IS 33 A1 Nicholas L. J. Chornenki A1 Michael Fralick A1 Michelle Sholzberg YR 2022 UL http://www.cmaj.ca/content/194/33/E1135.abstract