[1] Mayo Clin, Dept Neurol, 200 First St SW, Rochester, MN 55905 USA
[2] Univ Rochester, Med Ctr, Dept Neurol, Ctr Hlth Technol, Rochester, NY 14642 USA
[3] Rush Univ, Med Ctr, Dept Neurol Sci, Chicago, IL 60612 USA
[4] Radboud Univ Nijmegen, Donders Inst Brain Cognit & Behav, Dept Neurol, Med Ctr, Nijmegen, Netherlands
[5] Univ Toronto, Div Neurol, Dept Med, Toronto, ON, Canada
[6] San Francisco VA Med Ctr, Parkinsons Dis Res Educ & Clin Ctr, San Francisco, CA USA
[7] Univ Calif San Francisco, Dept Neurol, San Francisco, CA USA
[8] Cleveland Clin, Lou Ruvo Ctr Brain Hlth, Las Vegas, NV USA
[9] Johns Hopkins Univ, Baltimore, MD USA
[10] King Fahad Med City, Natl Neurosci Inst, Parkinsons Movement Disorders & Neurorestorat Pro, Riyadh, Saudi Arabia
[11] Sanatorio Trinidad Mitre, Dept Neurol, Buenos Aires, DF, Argentina
[12] Hosp Univ Burgos, Serv Neurol, Burgos, Spain