Key points are not available for this paper at this time.
Journal Article A RETROSPECTIVE STUDY OF SMOKING IN PARKINSON'S DISEASE Get access M. DEAN NEFZGER, M. DEAN NEFZGER 2Follow-up Agency, National Research Council, 2101 Constitution AvenueN. W., Washington, D. C. 20418 Search for other works by this author on: Oxford Academic PubMed Google Scholar FRED A. QUADFASEL, FRED A. QUADFASEL 3Neurology Division, Psychiatry, Neurology and Psychology Service, Veterans Administration Central OfficeWashington, D. C. 20420 Search for other works by this author on: Oxford Academic PubMed Google Scholar VIRGINIA C. KARL VIRGINIA C. KARL 4Administrative Standards and Services Division, Social Work Service, Veterans Administration Central OfficeWashington, D. C. 20420 Search for other works by this author on: Oxford Academic PubMed Google Scholar American Journal of Epidemiology, Volume 88, Issue 2, September 1968, Pages 149–158, https://doi.org/10.1093/oxfordjournals.aje.a120874 Published: 01 September 1968 Article history Received: 28 February 1968 Published: 01 September 1968
Nefzger et al. (Sun,) studied this question.