1. Universitat Autonòma de Barcelona, Medicina Interna, Barcelona, Catalunya, Spain
2. State University of Campinas, Neurology, Campinas, São Paulo, Brazil
3. Hospital Clinic, Clinical Pharmacology Unit, Barcelona, Catalunya, Spain
4. State University of Campinas, Social and Preventive Medicine
5. State University of Campinas, School of Medical Sciences, Campinas, São Paulo, Brazil