1. Internal Medicine Postgraduate ProgramHospital de Clínicas da Universidade Federal do Paraná Curitiba Brazil
2. Pain and Headache ClinicDivision of NeurologyNeurology and Psychiatry UnitHospital de Clínicas da Universidade Federal do Paraná Curitiba Brazil
3. Bauru Orofacial Pain Group Instituto de Ensino Odontológico de Bauru Bauru Brazil
4. Department of Internal Medicine Hospital de Clínicas da Universidade Federal do Paraná Curitiba Brazil