TY - JOUR T1 - Interchangeability of oral contraceptive products. Expert Advisory Committee on Bioavailability, Health Protection Branch, Department of National Health and Welfare JF - Canadian Medical Association Journal JO - CMAJ SP - 1223 LP - 1224 VL - 144 IS - 10 A2 - , Y1 - 1991/05/15 UR - http://www.cmaj.ca/content/144/10/1223.abstract ER -