1. Department of Medicine, St Joseph’s University Medical Center, NJ 07503, USA
2. Department of Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, USA
3. Department of Medicine, Loyola University Medical Center/Trinity – Mercy Hospital, IL 60616, USA
4. Department of Medicine, Ain Shams University, Cairo, 1181, Egypt
5. Department of Medicine, Division of Cardiovascular Diseases, University of Tennessee Health Science Center, Memphis, TN 38163, USA