The validated 0–10 visual analog scale (VAS) and the Migraine Disability Assessment (MIDAS) questionnaire were administered both at baseline and during the follow-up for assessing pain and disability. Higher scores on VAS and MIDAS served to indicate the severity of headache. Mood and anxiety were assessed with Beck Depression Inventory-II (BDI-II), and Hamilton Anxiety Rating Scale (HARS) at baseline and during the follow-up. Besides, we asked patients to fill in a headache diary throughout the study. A respondent to medical treatment (good outcome) was considered a subject who achieved a 50% or greater reduction in number of headache days per month.