Parkinson Disease With Old-Age Onset
Arch Neurol 60:529-533, Diederich,N.J.,et al, 2003
Unilateral Pallidotomy for Parkinson's Disease:Comparison of Outcome in Yonger Vs Elderly Patients
Neurol 49:1072-1077, Uitti,R.J.,et al, 1997
Does Ageing Aggravate Parkinsonisn Disability?
JNNP 54:780-782, Blin,J.,et al, 1991