1. Department of Internal Medicine, Central Michigan University, Saginaw, Michigan, USA
2. Department of Internal Medicine, Samaritan Medical Center, Watertown, New York, USA
3. Department of Internal Medicine, John H Stroger Jr. Hospital Cook County, Chicago, Ilinois, USA
4. Department of Internal Medicine, Geisinger School of Medicine, Scranton, Pennsylvania, USA
5. Department of Internal Medicine, Rutgers University, New Brunswick, New Jersey, USA
6. Department of Internal Medicine, University of Benin School of Medicine, Edo, Nigeria
7. Department of Family Medicine, Samaritan Medical Center, Watertown, New York, USA