1. Billy Amzal is a Doctoral Candidate, ENGREF, GRESE Laboratory, 75015 Paris, France . Frédéric Y. Bois is Senior Modeler-Statistician and Toxicologist, INERIS, 60550, Verneuil-en-Halatte, France. Eric Parent is Professor of Statistics, GRESE Laboratory, 75015 Paris, France. Christian P. Robert is Professor of Statistics, CEREMADE, Paris-Dauphine University, 75017 Paris, France. Partial funding for this work was provided by the French Ministry of Research and Technology (project DIADEME, decision 02 C...