RT Journal Article SR Electronic T1 What are the long-term effects of smoked marijuana on lung health? JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E1243 OP E1244 DO 10.1503/cmaj.181307 VO 190 IS 42 A1 Wan C. Tan A1 Don D. Sin YR 2018 UL http://www.cmaj.ca/content/190/42/E1243.abstract