1. McLaren Health Care, Flint, Michigan, USA
2. Michigan State University, East Lansing, Michigan, USA
3. Faculty of Medicine, Alexandria University, Alexandria, Egypt
4. Faculty of Medicine, Beni Suef University, Beni Suef, Egypt
5. Faculty of Medicine for Girls, Al-Azhar University, Cairo, Egypt
6. Faculty of Medicine, Cairo University, Cairo, Egypt
7. Baptist Medical Center South/Prattville Baptist Hospital, Montgomery, Alabama, USA
8. Levine Cancer Institute, Charlotte, NC, USA