Waung Maggie W, Grossman Aaron W, Barmada Sami J, Josephson S Andrew, Dillon William P, Ralph Jeffrey W
Department of Neurology, University of California San Francisco, San Francisco, CA, USA.
Neurology. 2012 Jul 31;79(5):e38-40. doi: 10.1212/WNL.0b013e3182616fe8.