1. Movement Disorders Unit, Neurology Service, Internal Medicine Department, Hospital de Clínicas; Federal University of Paraná; Curitiba PR Brazil
2. Neurology Service, Hospital Universitário; State University of Ponta Grossa; Ponta Grossa Brazil
3. Morton and Gloria Shulman Movement Disorders Clinic and the Edmond J. Safra Program in Parkinson's Disease, Toronto Western Hospital and Division of Neurology; University of Toronto; Toronto ON Canada