Cernuda-Morollón E, Riesco N, Martínez-Camblor P, Serrano-Pertierra E, García-Cabo C, Pascual J. No Change in Interictal PACAP Levels in Peripheral Blood in Women With Chronic Migraine. Headache. 2016 Oct;56(9):1448–54. doi: 10.1111/head.12949. PMID: 27634731.