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Muhammad Fidel Ganis Siregar
Division of Fertility and Reproductive Endocrinology, Department of Obstetrics and Gynecology, Faculty of Medical,
Universitas Sumatera UtaraMedan, Indonesia
R. S. Tambunan
Department of Obstetrics and Gynecology, Faculty of Medical,
Universitas Sumatera UtaraMedan, Indonesia