Affiliation: | 1. Movement Disorders Unit, Westmead Hospital, Westmead, , Sydney, New South Wales, Australia;2. Department of Neurology, Royal North Shore Hospital, St. Leonards, , Sydney, New South Wales, Australia;3. Department of Neurology, St. Vincents Hospital, Darlinghurst, , Sydney, New South Wales, Australia;4. Department of Neurology, Sydney Adventist Hospital, Wahroonga, , Sydney, New South Wales, Australia;5. Sydney Medical School, The University of Sydney, , Sydney, New South Wales, Australia |