[1] Natl Hosp Neurol & Neurosurg, Dept Clin & Movement Neurosci, London, England
[2] Univ Barcelona, Hosp Clin, Parkinson Dis & Movement Disorder Unit, Barcelona, Spain
[3] Univ Lisbon, Lab Clin Pharmacol & Therapeut, Fac Med, Lisbon, Portugal
[4] Univ Padua, Dept Neurosci, Padua, Italy
[5] Beelitz Hosp, Movement Disorders Clin, Beelitz, Germany
[6] Univ Toulouse, Dept Neurosci & Clin Pharmacol, Toulouse, France
[7] BIAL Portela & Ca SA, Global Parkinsons Dis Dept, Coronado, Portugal
[8] BIAL Portela & Ca SA, Res & Dev Dept, Coronado, Portugal