[AIP BAYESIAN INFERENCE AND MAXIMUM ENTROPY METHODS IN SCIENCE AND ENGINEERING: Proceedings of the 28th International Workshop on Bayesian Inference and Maximum Entropy Methods in Science and Engineering - Boraceia, Sao Paulo (Brazil) (6–11 July 2008)] AIP Conference Proceedings - Robust Bayesian Priors with Applications to Clinical Trials: Information and Cross-Entropic Approaches