Chamberlain Marc C, Eaton Keith D, Fink James
Department of Neurology and Neurological Surgery, Fred Hutchinson Cancer Research Center, Seattle Cancer Care Alliance, 825 Eastlake Ave East, Seattle, WA 98109-1023, USA.
Arch Neurol. 2011 Dec;68(12):1608-9. doi: 10.1001/archneurol.2011.621.