1. Parkinson's Disease and Movement Disorders Unit, Neurology Service Institut de Neurociencies UBNeuro, Hospital Clínic Universitari de Barcelona Barcelona Catalonia Spain
2. Lab of Parkinson's disease and other Neurodegenerative Movement Disorders: Clinical and Experimental Research Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS) Barcelona 08036 Catalonia Spain
3. Department of Clinical Pharmacology, Hospital Clinic, and Medical Statistics Core Facility Institutd'InvestigacionsBiomèdiques August Pi ISunyer (IDIBAPS) Barcelona Catalonia Spain
4. Biostatistics Unit, School of Medicine UniversitatAutònoma de Barcelona Barcelona Catalonia Spain