1. Division of Diabetes, University of Texas Health Science Center at San Antonio, and South Texas Veterans Health Care System, San Antonio, TX
2. Diabetes Clinical Research Center, Academic Health System, Hamad General Hospital, Doha, Qatar
3. Department of Clinical and Experimental Medicine, University of Pisa School of Medicine, Pisa, Italy
4. Division of Cardiology, University of Texas Health Science Center at San Antonio, and South Texas Veterans Health Care System, San Antonio, TX
5. Sandwell and West Birmingham Hospitals National Health Service Trust, Birmingham, U.K.