Affiliation: | 1. Birmingham Veterans Affairs Medical Center Research Enhancement Award Program , Birmingham, Alabama, USA;2. Department of Medicine , University of Alabama at Birmingham , Birmingham, Alabama, USA skertesz@uab.edu;4. Department of Mathematical Sciences , Villanova University , Villanova, Pennsylvania, USA;5. Harvard Medical School and Boston University School of Medicine , Boston, Massachusetts, USA;6. Boston Health Care for the Homeless Program , Boston, Massachusetts, USA;7. The Wright Institute , Berkely, California, USA;8. School of Management, Boston University , Boston, Massachusetts, USA |