Affiliation: | 1. Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA;2. Department of Internal Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA;3. Division of Infectious Diseases, University of Michigan Medical School, Ann Arbor, Michigan, USA;4. Department of Biostatistics, School of Public Health, University of Michigan, Ann Arbor, Michigan, USA |