[1] Univ Rochester, Med Ctr, Dept Neurol, Rochester, NY 14642 USA
[2] SUNY Buffalo, Sch Med & Biomed Sci, Sch Med, Buffalo, NY 14260 USA
[3] Michael J Fox Fdn Parkinsons Res, New York, NY USA
[4] Cornell Univ, Dept Policy Anal & Management, Ithaca, NY USA
[5] Univ Calif San Francisco, Dept Neurol, San Francisco, CA 94143 USA
[6] Alerion Inst, N Garden, VA USA