1. Bouchra R. Nasri is Assistant Professor, Département de médecine sociale et préventive, École de santé publique, Université de Montréal, C.P. 6128, succursale Centre-ville, Montréal (Québec) H3C 3J7, Canada
2. Bruno N. Rémillard is Honorary Professor, Department of Decision Sciences, HEC Montréal, 3000 Côte Sainte-Catherine, Montréal (Québec) H3T 2A7, Canada
3. Barbara Szyszkowicz is Professor, School of Mathematics and Statistics, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6, Canada
4. Jean Vaillancourt is Adjunct Professor, Department of Decision Sciences, HEC Montréal, 3000 Côte Sainte-Catherine, Montréal (Québec) H3T 2A7, Canada