1. University of Missouri Columbia, Department of Internal Medicine, Endocrinology and Diabetes Department, Harry S Truman VA Hospital, Columbia, MO, 1, Hospital Drive, Columbia, MO, 65 211, USA
2. University of Missouri Columbia, Department of Internal Medicine, Endocrinology and Diabetes Department, Harry S Truman VA Hospital, Columbia, MO, 1, Hospital Drive, Columbia, MO, 65 211, USA,