Authors: Christopher G Goetz; Glenn T Stebbins; David Wolff; William DeLeeuw; Helen Bronte-Stewart; Rodger Elble; Mark Hallett; John Nutt; Lorraine Ramig; Terence Sanger; Allan D Wu; Peter H Kraus; Lucia M Blasucci; Ejaz A Shamim; Kapil D Sethi; Jennifer Spielman; Ken Kubota; Andrew S Grove; Eric Dishman; C Barr Taylor Journal: Mov Disord Date: 2009-03-15 Impact factor: 10.338