Retinitis PigmentosaSurv Ophthalmol 33:137-177, Pagon,R.A., 1988
Mitochondrial Myopathy, Encephalopathy, Lactic Acidosis, & Strokelike Episodes:A Distinctive Clinical SyndromeAnn Neurol 16:481-488, Pavlakis,S.G.,et al, 1984