1. Laboratory of Histology, Medicine Faculty, Sfax University, Sfax, Tunisia;
2. Laboratory of Histology, Medicine College, Tunis El-Manar University, La Rabta, Tunisia;
3. Anatomopathology Laboratory, CHU Habib Bourguiba, University of Sfax, Sfax, Tunisia;
4. Laboratory of Animal Physiology, Sciences Faculty, Sfax University, Sfax, Tunisia