More Groups
Fewer Groups
More People
Fewer People
Begg, C. B.; Cramer, L. D.; Hoskins, W. J.; Brennan, M. F. JAMA - Journal of the American Medical Association (1999)
Begg, C. B.; Cramer, L. D.; Hoskins, W. J.; Brennan, M. F. JAMA - Journal of the American Medical Association (1998)
Kraus, D. H.; Dubner, S.; Harrison, L. B.; Strong, E. W.; Hajdu, S. I.; Kher, U.; Begg, C.; Brennan, M. F. Cancer (1994)