Brownell, Narisa, and Chanat Kumtornrut. “Cutaneous hyperpigmentation induced by daclatasvir, sofosbuvir, and ribavirin combination therapy”. Thai Journal of Dermatology 33, no. 2 (June 1, 2017): 173–179. accessed August 28, 2026. https://he02.tci-thaijo.org/index.php/TJD/article/view/159246.