Sidabutar, Elida, Binarwan Halim, Muhammad Fidel Ganis Siregar, Delfi Lutan, Ichwanul Adenin, and Yostoto Kaban. “Vitamin D Levels in Women With Polycystic Ovary Syndrome”. KnE Medicine 1, no. 1 (October 4, 2016): 125-132. Accessed April 18, 2024. https://knepublishing.com/index.php/KnE-Medicine/article/view/547.