RT Journal Article SR Electronic T1 Persistent myopericarditis after heterologous SARS-CoV-2 mRNA vaccination JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E584 OP E587 DO 10.1503/cmaj.221510 VO 195 IS 16 A1 Wu, Kai Yi A1 Butler, Craig R. A1 Koshman, Sheri A1 Oudit, Gavin Y. A1 Ian Paterson, D. YR 2023 UL http://www.cmaj.ca/content/195/16/E584.abstract