Nasution, Afra Meutia, and Haflin Soraya Hutagalung. “Relationship Between Stress Level of USU Medical Faculty Students With the Primary Headache During Online Lecture”. Sumatera Medical Journal 6, no. 1 (March 2, 2023). Accessed September 27, 2024. https://talenta.usu.ac.id/smj/article/view/7943.