Affiliation: | (1) Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA;(2) Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA;(3) Independent Dialysis Foundation, Baltimore, MD 21201, USA;(4) Renal Research Institute, New York, NY 10128, USA;(5) Department of Biostatistics, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA;(6) Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA |