RT Journal Article SR Electronic T1 Kava: a test case for Canada's new approach to natural health products JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1163 OP 1164 VO 169 IS 11 A1 Heather S. Boon A1 Albert H.C. Wong YR 2003 UL http://www.cmaj.ca/content/169/11/1163.abstract