PT - JOURNAL ARTICLE AU - Steven Wharry TI - Health Canada sounds warning over St. John's wort DP - 2000 Jun 13 TA - Canadian Medical Association Journal PG - 1723--1723-b VI - 162 IP - 12 4099 - http://www.cmaj.ca/content/162/12/1723.3.short 4100 - http://www.cmaj.ca/content/162/12/1723.3.full SO - CMAJ2000 Jun 13; 162