1. Institute for Aging Research; Hebrew Senior Life and Harvard Medical School; Boston MA USA
2. Colorado Center for Bone Research; Lakewood CO USA
3. Center for Clinical and Basic Research; Ballenrup Denmark
4. Amgen Inc.; Thousand Oaks CA USA
5. Keck Medical Center of University of Southern California; Los Angeles CA USA
6. University Health Network and University of Toronto; Toronto ON Canada
7. Biogen Idec; Cambridge MA USA