Cargnin, Sarah, Salvatore Terrazzino, Ennio Pucci, and Michele Viana. “Drug Resistance to Triptans: A Problem for Thousands of People in Italy”. Confinia Cephalalgica 26, no. 1 (July 5, 2016): 30–34. Accessed December 22, 2024. https://www.confiniacephalalgica.com/site/article/view/5535.