1 Movement Disorders Unit, Neurology Service, Internal Medicine Department, The Federal University of Minas Gerais, Belo Horizonte 30150-290, Brazil. Electronic address: fecardosoc@gmail.com.
2 Institut d'Investigacions Biomediques August Pi i Sunyer, Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas, Barcelona, Spain.