RT Journal Article SR Electronic T1 Pre-exposure prophylaxis for HIV: effective and underused JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E1164 OP E1170 DO 10.1503/cmaj.220645 VO 194 IS 34 A1 Hempel, Amanda A1 Biondi, Mia J. A1 Baril, Jean-Guy A1 Tan, Darrell H.S. YR 2022 UL http://www.cmaj.ca/content/194/34/E1164.abstract