Bhat, Showkat hassan, et al. “Calcitonin Gene-Related Peptide (CGRP) Concentrations Outside Migraine Attacks in Peripheral Blood As a Potential Biomarker for Chronic Migraine”. Headache Medicine, vol. 14, no. 2, June 2023, pp. 89-96, doi:10.48208/HeadacheMed.2023.18.