1. Department of Rheumatology, Immunology and Allergy, Health New Zealand, Christchurch 8011, New Zealand; Department of Medicine, University of Otago Christchurch, Christchurch 8011, New Zealand
2. Division of Rheumatology and Clinical Immunology, University of Alabama, Birmingham, AL 35294, USA; Birmingham VA Medical Center, Birmingham, AL 35233, USA