[1] Umea Univ, Dept Clin Neurosci, Umea, Sweden
[2] UCL Queen Sq Inst Neurol, Dept Movement Disorders, London, England
[3] UCLA, Dept Neurol, David Geffen Sch Med, Los Angeles, CA USA
[4] Brigham & Womens Hosp, Neurosurg Dept, Boston, MA USA
[5] Harvard Med Sch, Boston, MA USA
[6] Univ Amsterdam, Med Ctr, Dept Neurol, Amsterdam, Netherlands
[7] Emory Univ, Dept Neurol, Sch Med, Atlanta, GA USA
[8] Emory Univ, Dept Neurosurg, Sch Med, Atlanta, GA USA
[9] Hannover Med Sch, Dept Neurosurg, Hannover, Germany
[10] Toronto Western Hosp, Edmond J Safra Program Parkinsons Dis & Morton &, Toronto, ON, Canada
[11] Univ Toronto, Toronto, ON, Canada
[12] Univ Toronto, Dept Surg, Div Neurosurg, Toronto, ON, Canada
[13] HM Hospit, Hosp Univ HM Puerta Sur, Fdn Hosp Madrid, HM CINAC Ctr Integral Neurociencias Abarca Campal, Madrid, Spain
[14] Inst Carlos III, Network Ctr Biomed Res Neurodegenerat Dis CIBERNE, Madrid, Spain
[15] Univ CEU San Pablo, Madrid, Spain
[16] Amsterdam UMC, Dept Neurosurg, Amsterdam, Netherlands
[17] Univ Minnesota, Dept Neurol, Minneapolis, MN USA