Degenerative Diseases of the Nervous System, Amyotrophic Lateral Sclerosis
Adams & Victors Principles of Neurology, Chp 39, pg 1109, Ropper, A.H.,et al, 2014
Clinical Use of Botulinum Toxin
National Institutes of Health Consensus Develop Conf Stmt, Nov 12-14, 1990, Arch Neurol 48:1294-1298, 199, 1991