Impaired Glucose Tolerance

• Jean Verdier hospital, Department of Endocrinology-Diabetology-Nutrition — Bondy, France

• Leicester Diabetes Centre, Leicester General Hospital — Leicester, Leicestershire, United Kingdom

• University of Leipzig - heart center — Leipzig, Germany

• University Hospital Dr Peset — Valencia, Spain

• Dept. Internal Medicine, Div. Endocrinology, Charité Campus Mitte, University of Berlin — Berlin, Germany
• Endokrinologikum Dresden — Dresden, Germany
• Dept. Internal Medicine, Div. Endocrinology, University of Magdeburg — Magdeburg, Germany
• Dept. Internal Medicine, Endocrinology, Max Planck Institute for Neuroscience and Psychiatry — München, Germany

• PreCare Trial & Recruitment — Beek, Limburg, Netherlands

• Yale Center for Clinical Investigation — New Haven, Connecticut, United States

Not specified

• Grady Health System — Atlanta, Georgia, United States
• Emory University Hospital — Atlanta, Georgia, United States

• International Diabetes Center at Park Nicollet — Saint Louis Park, Minnesota, United States
• St. Paul Heart Clinic — Saint Paul, Minnesota, United States