Key points are not available for this paper at this time.
Journal Article A CARDIOVASCULAR SURVEY OF AMERICAN EAST COAST TELEPHONE WORKERS Get access W. W. HOLLAND, W. W. HOLLAND Search for other works by this author on: Oxford Academic PubMed Google Scholar E. B. RAFTERY, E. B. RAFTERY Search for other works by this author on: Oxford Academic PubMed Google Scholar P. McPHERSON, P. McPHERSON Search for other works by this author on: Oxford Academic PubMed Google Scholar R. W. STONE R. W. STONE Search for other works by this author on: Oxford Academic PubMed Google Scholar American Journal of Epidemiology, Volume 85, Issue 1, January 1967, Pages 61–71, https://doi.org/10.1093/oxfordjournals.aje.a120675 Published: 01 January 1967 Article history Received: 22 April 1966 Published: 01 January 1967
Holland et al. (Sun,) studied this question.