RT Journal Article SR Electronic 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 FD Canadian Medical Association SP 1223 OP 1224 VO 144 IS 10 YR 1991 UL http://www.cmaj.ca/content/144/10/1223.abstract