作者单位:RTBioconsultants Inc, San Diego, CA 92130 USA[1]Rush Univ, Med Ctr, Dept Neurol Sci, 1735 West Harrison St, Chicago, IL 60612 USA[2]Barrow Neurol Inst, Dept Neurobiol, Parkinsons Dis Res Unit, Phoenix, AZ 85013 USA[3]Mt Sinai Sch Med, Dept Neurol & Neurosci, New York, NY USA[4]