Sharma Vijay K, Teoh Hock Luen, Paliwal Prakash R, Chong Vincent F, Chan Bernard P L, Sinha Arvind K
Division of Neurology, Department of Medicine, National University Hospital, 5 Lower Kent Ridge Road, Singapore.
Circulation. 2011 Feb 22;123(7):e243-4. doi: 10.1161/CIRCULATIONAHA.110.972000.