1. Environmental risk factors for Parkinson's disease, the epidemiologic evidence;Schoenberg;Can. J. Neurol. Sci.,1987
2. Parkinson's disease in epidemiologic perspective;Kessler;Adv. Neurol.,1978
3. Morbidity and mortality with Parkinsonism;Williams;J. Neurosurg.,1966
4. Paralysis agitans mortality in England and Wales, 1855–1962;Duvoisin;Br. J. Prev. Soc. Med.,1966
5. The changing patterns of death rates in Parkinsonism;Kurtzke;Neurology,1990