Key points are not available for this paper at this time.
Modern Statistical Methods in Chronic Disease Epidemiology. Edited by S. H. Moolgavkar and R. L. Prentice. ISBN 0 471 839043. Wiley, 1986, 282p. Unpriced. (Proceedings of a Conference sponsored by SIAM Institute for Mathematics and Society).
Osmond et al. (Fri,) studied this question.