Claussen G C, Ahmad B K, Sunwoo I N, OH S J
Department of Neurology, University of Alabama at Birmingham, Veterans Affairs Medical Center 35294, USA.
Muscle Nerve. 1996 Feb;19(2):231-3. doi: 10.1002/(SICI)1097-4598(199602)19:2<231::AID-MUS18>3.0.CO;2-X.