“Correlation of Stress Levels and the Incidence of Pityriasis Sicca in Final Year Students of the Faculty of Medicine, Universitas Sumatera Utara Class of 2017”. Sumatera Medical Journal 4, no. 2 (April 20, 2021). Accessed November 22, 2024. https://talenta.usu.ac.id/smj/article/view/5775.