1. Robert and Arlene Kogod Center on Aging and Endocrine Research Unit; Mayo Clinic College of Medicine; Rochester MN USA
2. Department of Epidemiology, Graduate School of Public Health; University of Pittsburgh; Pittsburgh PA USA
3. Department of Medicine; Cambridge Biomedical Campus; Cambridge UK
4. Institute for Aging Research, Department of Medicine; Beth Israel Deaconess Medical Center and Harvard Medical School; Boston MA USA
5. Maine Medical Research Institute; Portland ME USA
6. University of Alabama at Birmingham; Birmingham AL USA
7. Division of Endocrinology, Department of Medicine; Columbia University; New York NY USA