[1] Univ Michigan, Sch Med, Dept Neurol, Ann Arbor, MI 48109 USA
[2] Univ Michigan, Dept Neurosurg, Ann Arbor, MI 48109 USA
[3] Natl Parkinson Fdn, Miami, FL USA
[4] Univ Florida, Dept Neurol, Movement Disorders Ctr, Gainesville, FL USA
[5] Struthers Parkinsons Ctr, Golden Valley, MN USA
[6] Radboud Univ Nijmegen, Med Ctr, Dept Neurol, Donders Inst Brain Cognit & Behav, NL-6525 ED Nijmegen, Netherlands
[7] Univ Kansas, Med Ctr, Dept Neurol, Parkinsons Dis & Movement Disorder Ctr, Kansas City, KS 66103 USA
[8] Univ Calif San Francisco, Dept Neurol, San Francisco, CA USA
[9] Suny Downstate Med Ctr, Dept Neurol, Brooklyn, NY 11203 USA
[10] Suny Downstate Med Ctr, Dept Ophthalmol, Brooklyn, NY 11203 USA
[11] Univ Marburg, Dept Neurol, Marburg, Germany
[12] Univ Calgary, Dept Med Genet & Clin Neurosci, Calgary, AB, Canada
[13] Brown Univ, Alpert Med Sch, Dept Neurol, Butler Hosp, Providence, RI 02912 USA
[14] Univ Florida, Dept Neurosurg, Gainesville, FL USA