Degenerative Diseases of the Nervous System, Amyotrophic Lateral Sclerosis
Adams & Victors Principles of Neurology, Chp 39, pg 1109, Ropper, A.H.,et al, 2014
Distal Myopathies:Clinical and Molecular Diagnosis and Classification
JNNP 67:703-709, Mastaglia,F.J.&Laing,N.G., 1999