1Clinical Chemistry Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia
2Division of Nephrology, Department of Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
3Immunochemical Core Laboratory, Mayo Clinic, Rochester, Minnesota
4Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota
5Division of Nephrology and Hypertension, Department of Internal Medicine, Mayo Clinic, Rochester, Minnesota
6Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota
Correspondence: Dr. Rajiv Kumar, Medical Sciences 1-120, Division of Nephrology and Hypertension, Department of Internal Medicine, Mayo Clinic, 200 1st Street SW, Rochester, MN 55905. Email: [email protected]