PT - JOURNAL ARTICLE AU - Eric Wooltorton TI - Hua Fo tablets tainted with sildenafil-like compound DP - 2002 Jun 11 TA - Canadian Medical Association Journal PG - 1568--1568 VI - 166 IP - 12 4099 - http://www.cmaj.ca/content/166/12/1568.short 4100 - http://www.cmaj.ca/content/166/12/1568.full SO - CMAJ2002 Jun 11; 166