Age on Onset, Sex, & Cardiomyopathy as Predictors of Disability and Survival in Friedreich's Disease
Neurol 47:1260-1264, DeMichele,G.,et al, 1996
Clinicopathological Study of 35 Cases of Multiple System Atrophy
JNNP 58:160-166, Wenning,G.K.,et al, 1995