1. Department of Neurology Centro Hospitalar Universitário São João, EPE Porto Portugal
2. Department of Clinic Neurosciences and Mental Health Faculty of Medicine of University of Porto Porto Portugal
3. Department of Neurology Centro Hospitalar Universitário de Coimbra Coimbra Portugal
4. Department of Neurology Hospital Central do Funchal Funchal Portugal
5. Edmond J Safra Program in Parkinson Disease, Movement Disorder Clinic Toronto Western Hospital, and the University of Toronto Department of Medicine Toronto Ontario Canada