[1] New York State Dept Hlth, Wadsworth Ctr, Albany, NY 12201 USA
[2] Univ Washington, Sch Med, Ctr Geriatr Res Educ & Clin, VA Puget Sound Healthcare Syst, Seattle, WA 98195 USA
[3] Univ Washington, Sch Med, Dept Neurol, Seattle, WA 98195 USA
[4] Emory Univ, Sch Med, Dept Neurol, Atlanta, GA 30322 USA
[5] Albany Med Ctr, Parkinsons Dis & Movement Disorder Clin, Albany, NY USA
[6] Univ Washington, Parkinsons Dis Res Educ & Clin Ctr, VA Puget Sound Hlth Care Syst, Seattle, WA 98195 USA
[7] Univ Washington, Dept Neurol, Seattle, WA 98195 USA
[8] Oregon Hlth & Sci Univ, Dept Neurol, Portland, OR 97201 USA
[9] Virginia Mason Med Ctr, Seattle, WA 98101 USA
[10] Evergreen Hosp, Med Ctr, Booth Gardner Parkinsons Care Ctr, Kirkland, WA USA
[11] Alden March Bioeth Inst, Albany, NY USA