PT - JOURNAL ARTICLE AU - David Helwig TI - US pharmacy chain tracks customer's use of herbals DP - 2000 Mar 21 TA - Canadian Medical Association Journal PG - 852--852 VI - 162 IP - 6 4099 - http://www.cmaj.ca/content/162/6/852.1.short 4100 - http://www.cmaj.ca/content/162/6/852.1.full SO - CMAJ2000 Mar 21; 162