Refsum Disease
In Rowland's Merritt's Textbk of Neurology, Lea & Febiger, Phila, 8thEd, p. 509, Menkes,J.H., 1989
Retinitis Pigmentosa
Surv Ophthalmol 33:137-177, Pagon,R.A., 1988
Variants and Mimics of Guillain Barre Syndrome
The Neurologist 10:61-74, Levin,K.H., 2004