Affiliation: | 1 Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX;2 The Charles and Jane Pak Center for Mineral Metabolism and Clinical Research, University of Texas Southwestern Medical Center, Dallas, TX;3 Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China;4 Department of Clinical Sciences, University of Texas Southwestern Medical Center, Dallas, TX |