RT Journal Article SR Electronic T1 Greater action on climate change by physicians needed JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E1818 OP E1818 DO 10.1503/cmaj.80289 VO 193 IS 47 A1 Mili Roy YR 2021 UL http://www.cmaj.ca/content/193/47/E1818.abstract