PT - JOURNAL ARTICLE AU - Erin Walkinshaw TI - Press that button again, please AID - 10.1503/cmaj.109-4112 DP - 2012 Mar 20 TA - Canadian Medical Association Journal PG - E242--E243 VI - 184 IP - 5 4099 - http://www.cmaj.ca/content/184/5/E242.short 4100 - http://www.cmaj.ca/content/184/5/E242.full SO - CMAJ2012 Mar 20; 184