Cuadrado ML, Aledo-Serrano Á, Jiménez-Almonacid J, de Lera M, Guerrero ÁL. Facial pain radiating upwards: could the pain of epicrania fugax start in the lower face? Headache. 2015 May;55(5):690-5. doi: 10.1111/head.12492. PubMed PMID: 25532591.