1. Department of Medicine (X.W., N.Y., J.J., S.J.F.), Birmingham, Alabama 35294
2. Institute of Cell Biology (X.W.), Shandong University, School of Medicine, and Department of Endocrinology, Shandong Provincial Hospital of Shandong University, Jinan, China 250021
3. Division of Endocrinology, Diabetes, and Metabolism, Department of Cell Biology (L.D., Y.G., S.J.F.), Birmingham, Alabama 35294
4. Department of Pathology (X.L.), University of Alabama at Birmingham, Birmingham, Alabama 35294
5. Endocrinology Section (S.J.F.), Medical Service, Veterans Affairs Medical Center, Birmingham, Alabama 35233