| Contraceptive efficacy of a combined oral contraceptive containingethinyloestradiol 20@mg/drospirenone 3mg administered in a 24/4 regimen: apooled analysis of four open-label studies |
Anttila, L.;Bachmann, G.;Hernadi, L.;Kunz, M.;Marr, J.;Klipping, C.; |
European Journal of Obstetrics & Gynecology and Reproductive Biology |
2011-04-01 |
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