1. Quantitative Sciences, Statistics & Decision Sciences; Janssen Pharmaceutica; Turnhoutseweg 30, Beerse 2340 Belgium
2. Institute of Statistics, Biostatistics and Actuarial Sciences (ISBA); Université Catholique de Louvain (UCL); Voie du Roman Pays 20, bte L1.04.01, Louvain-la-Neuve B-1348 Belgium