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23. Extended-cycle versus conventional treatment with a combined oral contraceptive containing ethinylestradiol (30 μg) and levonorgestrel (150 μg) in a randomized controlled trial. Hadji P; Neulen J; Schaudig K; Schwenkhagen A; Grimmbacher S; Wiegratz I Gynecol Endocrinol; 2020 Jun; 36(6):513-520. PubMed ID: 32064971 [TBL] [Abstract][Full Text] [Related]
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