1. Department of Biology, Laboratory of Health Sciences and Technologies, Higher Institute of Health Sciences, Hassan the First University, Settat, Morocco
2. Laboratory of Human Ecology, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech, Morocco
3. Departamento de Biología, Unidad de Antropología Facultad de Ciencias. Universidad Autónoma de Madrid, Madrid, Spain
4. Consultant Epidemiologist in Private Practice, Luxembourg