1. Department of Medicine Donald and Barbara Zucker School of Medicine at Hofstra/Northwell Hempstead New York USA
2. University of Chicago Pritzker School of Medicine Chicago Illinois USA
3. University of Colorado School of Medicine Aurora Colorado USA
4. Baylor College of Medicine Houston Texas USA
5. Department of Medicine South Texas Veterans Health Care System San Antonio Texas USA
6. University of Texas Health Science Center at San Antonio San Antonio Texas USA
7. Harvard Medical School and Beth Israel Deaconess Medical Center Boston Massachusetts USA