1. Department of Medicine, Cape Fear Valley Hospital, Fayetteville, NC, USA
2. Fayetteville State University, Fayetteville, NC, USA
3. Department of Medicine, Reading Hospital, Reading, PA, USA
4. Department of Rheumatology, Indiana Regional Medical Center, Indiana, PA, USA
5. Department of Hematology and Oncology, Thomas Jefferson University Hospital, Philadelphia, PA, USA