1. Laboratory of Health Sciences and Technics, High Institute of Health Sciences, Hassan 1st University, Settat, Morocco
2. Laboratory of Human Ecology. Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh, Morocco
3. Consultant Epidemiologist, Luxembourg
4. Unidad de Antropología, Departamento de Biología, Facultad de Ciencias. Universidad Autónoma de Madrid, Madrid, Spain