Effectiveness and Safety of Very Low Dose Combined Oral Contraceptive for the Treatment of Non-atypical Endometrial Hyperplasia: A Pilot Study oleh Pichai Leerasiri, Manee Rattanachaiyanont, Surasak Angsuwathana, Kitirat Techatraisak, Prasong Tanmahasamut, Suchada Tanphatthana