Bhattacharya K F, Giannakikou I, Munroe N, Chaudhuri K R
Movement Disorders Unit, King's College Hospital/Guy's King's and St. Thomas Medical School, London, UK.
Mov Disord. 2000 Nov;15(6):1285-7. doi: 10.1002/1531-8257(200011)15:6<1285::aid-mds1044>3.0.co;2-u.