1. Division of Endocrinology, Diabetes and Metabolism, Tufts-New England Medical Center, Boston, Massachusetts
2. Bone Metabolism Laboratory, Jean Mayer U.S. Department of Agriculture Human Nutrition Research Center on Aging, Tufts University, Boston, Massachusetts
3. Harvard School of Public Health and Channing Laboratory, Boston, Massachusetts
4. Division of Preventive Medicine, Brigham and Women’s Hospital, Boston, Massachusetts