PT - JOURNAL ARTICLE AU - Marcin Chwistek TI - When you have eliminated the impossible … AID - 10.1503/cmaj.111452 DP - 2012 Oct 16 TA - Canadian Medical Association Journal PG - E823--E823 VI - 184 IP - 15 4099 - http://www.cmaj.ca/content/184/15/E823.short 4100 - http://www.cmaj.ca/content/184/15/E823.full SO - CMAJ2012 Oct 16; 184