PT - JOURNAL ARTICLE AU - Collier, Roger TI - Prevalence of ghostwriting spurs calls for transparency AID - 10.1503/cmaj.109-3036 DP - 2009 Oct 13 TA - Canadian Medical Association Journal PG - E161--E162 VI - 181 IP - 8 4099 - http://www.cmaj.ca/content/181/8/E161.short 4100 - http://www.cmaj.ca/content/181/8/E161.full SO - CMAJ2009 Oct 13; 181