Bülent Yaşar, Şirin Yaşar, and Pembegül Güneş. 2019. “Face Skin Hyperpigmentation During Pegylated Interferon and Ribavirin Therapy”. Turkish Journal of Gastroenterology 26 (2):189-90. https://tjg.avesjournals.com/index.php/tjg/article/view/3126.