1. Division of General Internal Medicine; University of Texas Southwestern Medical Center; Dallas Texas USA
2. Division of Hospital Medicine; University of Texas Health Science Center at San Antonio; San Antonio Texas USA
3. South Texas Veterans Health Care System; San Antonio Texas USA
4. Department of Family and Community Medicine; University of North Texas Health Science Center; Fort Worth Texas USA
5. Division of General Internal Medicine and Primary Care; Brigham and Women's Hospital; Boston Massachusetts USA
6. Community Medicine Division; Parkland Health & Hospital System; Dallas Texas USA