RT Journal Article SR Electronic T1 Obturator hernia JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E50 OP E50 DO 10.1503/cmaj.211095 VO 194 IS 2 A1 Nakagawa, Hiroaki A1 Asakura, Tsukasa A1 Hamaguchi, Sugihiro YR 2022 UL http://www.cmaj.ca/content/194/2/E50.abstract