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- Clinical performance and endocrine profiles with contraceptive vaginal rings containing a combination of estradiol and levonorgestrel.Amer. J. Obstet. Gynecol. 1978; 130: 55-62
- A multicenter study of levonorgestrel-estradiol contraceptive vaginal rings. II. Subjective and objective measures of effects. An international comparative trial.Contraception. 1981; 24: 359-376
- The effect on lipids and lipoproteins of a contraceptive vaginal ring containing levonorgestrel and estradiol.Contraception. 1981; 24: 429-449
Åhrén, T., Lithell, H., Victor, A., Vessby, B. and Johansson, E.D.B.: Serum lipoprotein and apolipoprotein changes during treatment with a contraceptive ring containing levonorgestrel and estradiol. Contraception (Submitted for publication).
- Lipoprotein patterns in women in Santo Domingo using a levonorgestrel/estradiol contraceptive ring.Contraception. 1981; 24: 469-480