1. Faculty of Health Sciences, Beirut Arab University, Beirut P.O. Box 11-5020, Lebanon
2. Department of Biological Sciences, Wayne State University, Detroit, MI 48202, USA
3. Department of Cell Physiology and Metabolism, Faculty of Medicine, University of Geneva, 1205 Geneva, Switzerland
4. Laboratory Sciences Department, Faculty of Public Health, Islamic University of Lebanon (IUL), Khalde P.O. Box 30014, Lebanon