1 Division of Rheumatology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02215, USA; Division of Geriatrics, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02215, USA. Electronic address: dmisra@bidmc.harvard.edu.
2 Bergisches Rheuma-Zentrum, Krankenhaus St. Josef, Wuppertal, Germany.
3 Geriatrics Center and Institute of Gerontology, University of Michigan, Ann Arbor, MI, USA; Department of Internal Medicine, Division of Geriatric and Palliative Medicine, University of Michigan, Ann Arbor, MI, USA; Veterans Affairs Ann Arbor Geriatrics Research, Education and Clinical Center, Ann Arbor, MI, USA.
4 Division of Rheumatic Diseases, Department of Medicine, UT Southwestern Medical Center, Dallas, TX, USA; Rheumatology, Medical Service, Veterans Administration North Texas Health Care System, Dallas VA North Texas Health Care System, Dallas, TX, USA.