Degenerative Diseases of the Nervous System, Progressive Supranuclear Palsy
Adams & Victors Principles of Neurology, Chp 39, pg 1096, Ropper, A.H.,et al, 2014
Extrapyramidal Involvement in Rett's Syndrome
Neurol 40:293-295, FitzGerald,P.M.,et al, 1990