Key points are not available for this paper at this time.
David J. Spiegelhalter, Laurence S. Freedman, Mahesh K. B. Parmar, Bayesian Approaches to Randomized Trials, Journal of the Royal Statistical Society. Series A (Statistics in Society), Vol. 157, No. 3 (1994), pp. 357-416
Spiegelhalter et al. (Sat,) studied this question.