%0 Letter %T Letter to the editor regarding European Headache Federation guideline on the use of monoclonal antibodies acting on the calcitonin gene related peptide or its receptor for migraine prevention. %A Nichols R %A Skljarevski V %A Dell'Agnello G %A Hundemer HP %A Aurora SK %J J Headache Pain %V 20 %N 1 %D Mar 2019 1 %M 30823868 %F 8.588 %R 10.1186/s10194-019-0975-2 %X