1 Division of Rheumatology, Department of Internal Medicine, John P. and Katherine G. McGovern Medical School, University of Texas Health Science Center at Houston, Houston, Texas, USA; mark.c.hwang@uth.tmc.edu.
2 Division of Rheumatology, Department of Internal Medicine, John P. and Katherine G. McGovern Medical School, University of Texas Health Science Center at Houston, Houston, Texas, USA.
3 Peter O'Donnell Jr. School of Public Health - University of Texas Southwestern Medical Center, Dallas, Texas, USA.
4 Department of Medicine, Division of Rheumatology, University of California San Francisco, San Francisco, California, USA.
5 Department of Medicine, Division of Rheumatology, Cedars-Sinai Medical Center, Los Angeles, California, USA.
6 National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA.
7 Guy's and St Thomas' NHS Foundation Trust, and King's College London NIHR Biomedical Research Centre, London, UK.
8 Biostatistics/Epidemiology/Research Design (BERD) Core, Center for Clinical and Translational Sciences, Department of Internal Medicine, John P. and Katherine G. McGovern Medical School, University of Texas Health Science Center at Houston, Houston, Texas, USA.