PT - JOURNAL ARTICLE ED - , TI - Be cautious when prescribing to Americans, doctors warned DP - 2001 Jan 23 TA - Canadian Medical Association Journal PG - 245--245 VI - 164 IP - 2 4099 - http://www.cmaj.ca/content/164/2/245.short 4100 - http://www.cmaj.ca/content/164/2/245.full SO - CMAJ2001 Jan 23; 164