TY - JOUR T1 - Ovarian yolk sac tumor in postmenopausal females: a report of five cases and a literature review A1 - Wang,X. A1 - He,J. A1 - Li,Y. JO - European Journal of Gynaecological Oncology VL - 37 IS - 3 SP - 374 EP - 379 SN - 2709-0086 Y1 - 2016 ER -