Febriannie, Angela, Renobulan Sanusi, Reny Fahdiyani, and Riani Dwianasari. “Prevalence of Headache and Impact on Anxiety in Adults”. Universa Medicina 29, no. 2 (August 26, 2010): 84–89. Accessed August 6, 2021. https://univmed.org/ejurnal/index.php/medicina/article/view/206.