RT Journal Article SR Electronic T1 Crashes on cannabis celebration day JF Injury Prevention JO Inj Prev FD BMJ Publishing Group Ltd SP injuryprev-2019-043262 DO 10.1136/injuryprev-2019-043262 A1 John A Staples A1 Donald A Redelmeier YR 2019 UL http://injuryprevention.bmj.com/content/early/2019/07/13/injuryprev-2019-043262.abstract AB