1. Laboratory of Pharmacology, Faculty of Medicine, University of Monastir, Monastir, Tunisia
2. Laboratory of Histology Embryology and Cytogenetic, Faculty of Medicine, University of Monastir, Monastir, Tunisia
3. Laboratory of Biomonitoring of the Environment, Faculty of Science of Bizerte, Carthage University, Tunis, Tunisia
4. Unit of Chronobiology, Foundation A. de Rothschild, Paris Cedex, France