1 Medical Service, Veterans Affairs Salt Lake City Health Care System, Salt Lake City, UT, USA; Division of Nephrology & Hypertension, University of Utah School of Medicine, Salt Lake City, UT 84112, USA. Electronic address: [email protected].
2 Division of Biostatistics, University of Utah School of Medicine, Salt Lake City, UT, USA.
3 Division of Nephrology & Hypertension, University of Utah School of Medicine, Salt Lake City, UT 84112, USA.
4 Veterans Affairs Medical Center, Memphis, TN, USA.
5 Medical Service, Veterans Affairs Salt Lake City Health Care System, Salt Lake City, UT, USA; Division of Nephrology & Hypertension, University of Utah School of Medicine, Salt Lake City, UT 84112, USA.
6 Tulane University School of Public Health and Tropical Medicine, New Orleans, LA, USA.