(Q53929832)
Statements
Cycle control with oral contraceptives containing 20 micrograms of ethinyl estradiol. A multicenter, randomized comparison of levonorgestrel/ethinyl estradiol (100 micrograms/20 micrograms) and norethindrone/ethinyl estradiol (1000 micrograms/20 mic (English)
DelConte A
Loffer F
Grubb GS
1 March 1999
59
3
187-193
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