1. University of Tunis el Manar, Higher Institute of Medicals Technologies of Tunis (ISTMT), Unit of Research ERCO-INSAT, 9 Rue Zouhair Essafi, 1006 Tunis, Tunisia
2. National High School of Engineering of Tunis (ENSIT), Unit of Research ERCO-INSAT, Avenue Taha Hussein Montfleury, 1008 Tunis, Tunisia
3. University of Carthage, National Institute of Applied Sciences and Technologies, Unit of Research ERCO-INSAT, Centre Urbain Nord BP 676, 1080 Tunis, Tunisia