1. Division of Cardiology; The University of Texas Health Science Center at San Antonio; San Antonio Texas
2. Division of Cardiovascular Diseases Mayo, Clinic Rochester, Minnesota
3. Department of Endocrinology and Geriatrics, Zhongshan Hospital, Fudan University; China
4. Division of Cardiology; The University of Texas Health Science Center at San Antonio and Audie L. Murphy VA Hospital; San Antonio Texas