RT Journal Article SR Electronic T1 Smartphones, social media use and youth mental health JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E136 OP E141 DO 10.1503/cmaj.190434 VO 192 IS 6 A1 Abi-Jaoude, Elia A1 Naylor, Karline Treurnicht A1 Pignatiello, Antonio YR 2020 UL http://www.cmaj.ca/content/192/6/E136.abstract AB