Supplemental material for Observational, open-label, non-randomized study on the efficacy of onabotulinumtoxinA in the treatment of nummular headache: The pre-numabot study

Supplemental Material for Observational, open-label, non-randomized study on the efficacy of onabotulinumtoxinA in the treatment of nummular headache: The pre-numabot study by David García-Azorín, Javier Trigo-López, Álvaro Sierra, Laura Blanco-García, Enrique Martínez-Pías, Blanca Martínez, Blanca Talavera and Ángel L Guerrero in Cephalalgia