[1] Natl Hosp Neurol & Neurosurg, Sobell Dept Motor Neurosci & Movement Disorders, London, England
[2] Univ Med Ctr Hamburg Eppendorf UKE, Dept Neurol, Hamburg, Germany
[3] Univ Seville, Hosp Univ Virgen del Rocio, Serv Neurol & Neurofisiol Clin, Unidad Trastornos Movimiento,Inst Biomed Sevilla,, Seville, Spain
[4] Ctr Invest Biomed Red Enfermedades Neurodegenerat, Madrid, Spain
[5] Univ Hlth Network, Morton & Gloria Shulman Movement Disorders Clin, Toronto, ON, Canada
[6] Univ Hlth Network, Edmond J Safra Program Parkinsons Dis, Toronto, ON, Canada
[7] Grp Hosp Pitie Salpetriere, AP HP, Dept Neurol, F-75634 Paris, France
[8] UPMC, CRICM, INSERM, UMR 1127,CNRS,UMR7225,Brain & Spine Inst, Paris, France
[9] Univ Paris 06, Paris, France