article 2021 Effect of oral contraceptives containing estradiol valerate vs. ethinyl estradiol combined with dienogest on biomarkers of coagulation a randomized clinical trial ·doi:10.1530/endoabs.73.pep4.1 Searchable abstracts of presentations at key conferences in endocrinology ISSN 1470-3947 (print) | ISSN 1479-6848 (online)