1. Research Program in Men's Health: Aging and Metabolism; Boston Claude D. Pepper Older Americans Independence Center; Brigham and Women's Hospital Harvard Medical School Boston Massachusetts USA
2. Division of Diabetes Endocrinology and Metabolism Imperial College London Faculty of Medicine, Hammersmith Hospital London UK
3. Section of Investigative Medicine Imperial College London Faculty of Medicine Hammersmith Hospital London UK
4. Division of Endocrinology Massachusetts General Hospital Boston Massachusetts USA
5. Medical School, University of Western Australia; Department of Endocrinology and Diabetes Fiona Stanley Hospital Perth Western Australia Australia
6. Geriatric Research, Education and Clinical Center, VA Puget Sound Health Care System and Division of Gerontology and Geriatric Medicine, Department of Medicine University of Washington School of Medicine Seattle Washington USA