1. Department of Health Services Research, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
2. Section of Rheumatology and Immunology, Department of General Internal Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
3. Division of Rheumatology, Department of Medicine, Johns Hopkins University, Baltimore, MD 21224, USA
4. Cleveland Clinic Foundation, Cleveland Heights, OH 44195, USA