1. Faculty of Medicine, Tanta University, Tanta, Gharbia, Egypt
2. Faculty of Medicine, University of Algiers 1, Algiers, Algeria
3. Tanta Students’ Research Academy, Tanta University, Tanta, Gharbia, Egypt
4. Faculty of Medicine, Michigan State University, East Lansing, MI, USA
5. Department of Internal Medicine, McLaren Health Care, Oakland, MI, USA