Treatment of Advanced Parkinson's Disease by Posterior GPi Pallidotomy:1-Year Results of a Pilot Study
Ann Neurol 40:355-366, 3411996., Baron,M.S.,et al, 1996
The Use of Fetal Tissue in Research on Parkinson's Disease
NEJM 327:1591-1592, Kassirer,J.P.&Angell,M., 1992
A Brain Transplant that Works
Lancet 335:445-446, , 1990