1. Effects of seven low-dose combined contraceptives on vitamin B-6 status;van der Vange;Contraception.,1989
2. The psychoaffective profile of women taking oral contraceptives in relation to vitamin B-6 status;Massé,1988
3. Nutritional effects of oral contraceptive use. A review;Webb;J Reprod Med.,1980
4. Serum copper and zinc in hormonal contraceptive users;Prema;Fertil Steril.,1980
5. Effect of oral contraceptive agents on vitamin and mineral requirements;Thorp;J Am Diet Assoc.,1980