AgoraphobiaPanic DisorderPhobic DisordersAnxiety DisordersMigraine DisordersImplosive TherapyMigraine without AuraTension-Type HeadachePsychiatric Status Rating ScalesAnticipation, PsychologicalDiagnostic and Statistical Manual of Mental DisordersCognitive TherapyNew EnglandComorbidityHeadacheInterview, PsychologicalErgotamineMigraine with AuraMotion SicknessSeverity of Illness IndexBaltimoreHeadache DisordersQuestionnaires