M. Mochtar, S. E. Ilona, D. Zulfikar, A. Murastami, and S. Widhiati, “A split-face of dermaroller and intradermal injection with the autologous platelet rich fibrin lysate in the treatment of exogenous ocronosis: A case series”, Dermatol Reports, vol. 11, no. s1, Apr. 2019.