TY - JOUR T1 - Regulation of natural health products challenged JF - Canadian Medical Association Journal JO - CMAJ SP - 1217 LP - 1217-a DO - 10.1503/cmaj.1040481 VL - 170 IS - 8 AU - Jocalyn Clark Y1 - 2004/04/13 UR - http://www.cmaj.ca/content/170/8/1217.2.abstract ER -