{Reference Type}: Letter {Title}: Letter to the editor: European headache federation guidelines on the use of monoclonal antibodies acting on the calcitonin gene-related peptide or its receptor for migraine prevention. {Author}: Mikol DD;Snellman J; {Journal}: J Headache Pain {Volume}: 20 {Issue}: 1 {Year}: 06 2019 4 {Factor}: 8.588 {DOI}: 10.1186/s10194-019-0994-z {Abstract}: