PT - JOURNAL ARTICLE AU - Yoon K. Loke AU - Sonal Singh TI - Two of the authors respond: AID - 10.1503/cmaj.1090004 DP - 2009 Apr 14 TA - Canadian Medical Association Journal PG - 842--843 VI - 180 IP - 8 4099 - http://www.cmaj.ca/content/180/8/842.short 4100 - http://www.cmaj.ca/content/180/8/842.full SO - CMAJ2009 Apr 14; 180