Piano Anthony N, Tan Louis C S
Parkinson's Disease and Movement Disorders Centre, Department of Neurology, National Neuroscience Institute, Singapore 308433, Singapore.
Parkinsonism Relat Disord. 2013 Nov;19(11):1069-70. doi: 10.1016/j.parkreldis.2013.07.012. Epub 2013 Aug 3.