1. Department of public health, Biostatistics, Institute of pharmaceutic and biological sciences, Lyon, France
2. Emerging pathogens laboratory - Fondation Mérieux, International Center for Infectiology Research(CIRI), Lyon, France
3. Unit of Development and Research in Medical Education, University of Geneva Faculty of Medicine, Geneva, Switzerland
4. Medical Education Unit, Faculty of science and medicine, University of Lausanne, Lausanne, Switzerland