PT - JOURNAL ARTICLE AU - Marianne Willis TI - Registration requirements AID - 10.1503/cmaj.1060207 DP - 2007 Jan 02 TA - Canadian Medical Association Journal PG - 69--70 VI - 176 IP - 1 4099 - http://www.cmaj.ca/content/176/1/69.3.short 4100 - http://www.cmaj.ca/content/176/1/69.3.full SO - CMAJ2007 Jan 02; 176