RT Journal Article SR Electronic T1 Is one-way masking enough? JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E682 OP E682 DO 10.1503/cmaj.1095999 VO 194 IS 19 A1 Vogel, Lauren YR 2022 UL http://www.cmaj.ca/content/194/19/E682.abstract