Lim Erle C H, Seet Raymond C S
Yong Loo Lin School of Medicine, National University of Singapore, Division of Neurology, National University Hospital, 5 Lower Kent Ridge Road, Singapore.
Nat Clin Pract Neurol. 2008 Aug;4(8):462-3. doi: 10.1038/ncpneuro0849. Epub 2008 Jul 1.