Fig. 1From: Short-term diagnostic stability of probable headache disorders based on the International Classification of Headache Disorders, 3rd edition beta version, in first-visit patients: a multicenter follow-up studyFlow chart indicating the participation and follow-up of the study patients (abbreviations: TTH, tension-type headache; TAC, trigeminal autonomic cephalalgias; OPHD, other primary headache disorders; RCVS, reversible cerebral vasoconstriction syndrome)Back to article page