%0 Letter %T 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. %A Mikol DD %A Snellman J %J J Headache Pain %V 20 %N 1 %D 06 2019 4 %M 31164079 %F 8.588 %R 10.1186/s10194-019-0994-z %X