1. Division of Geriatrics and Nutritional Sciences, Department of Medicine; Washington University School of Medicine; St. Louis MO USA
2. Department of Endocrinology and Diabetes; University Campus Bio-Medico; Rome Italy
3. Department of Nutrition and Dietetics; St. Louis University; St. Louis MO USA
4. Centre for Diabetes at Barts and The London School of Medicine and Dentistry; London UK