Authors: Jordan J Elm; Christopher G Goetz; Bernard Ravina; Kathleen Shannon; George Fredrick Wooten; Caroline M Tanner; Yuko Y Palesch; Peng Huang; Paulo Guimaraes; Cornelia Kamp; Barbara C Tilley; Karl Kieburtz Journal: Ann Neurol Date: 2005-02 Impact factor: 10.422