RT Journal Article SR Electronic T1 A heart twice as big as normal JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E821 OP E822 DO 10.1503/cmaj.230126 VO 195 IS 23 A1 Mapelli, Massimo YR 2023 UL http://www.cmaj.ca/content/195/23/E821.abstract