Affiliation: | 1. Department of Internal Medicine, John H. Stroger Jr. Hospital of Cook County, Chicago, Illinois, USA;2. Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA;3. Department of Biostatistics, Epidemiology and Informatics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA;4. Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA |