Degenerative Diseases of the Nervous System, Amyotrophic Lateral Sclerosis
Adams & Victors Principles of Neurology, Chp 39, pg 1109, Ropper, A.H.,et al, 2014
Case Records of MGH-Polycythemia
Carotid Occlusion & Cerebral Infarcts, NEJM 291:96674., , 1974