1. Division of Infectious Diseases, Department of Medicine, Perelman School of Medicine University of Pennsylvania Philadelphia Pennsylvania USA
2. Center for Pharmacoepidemiology Research and Training, Center for Clinical Epidemiology and Biostatistics, Department of Biostatistics, Epidemiology, and Informatics, Perelman School of Medicine University of Pennsylvania Philadelphia Pennsylvania USA
3. Department of Orthopedic Surgery, Perelman School of Medicine The University of Pennsylvania Philadelphia Pennsylvania USA
4. VA Connecticut Health System West Haven Connecticut USA
5. Department of Medicine Yale University School of Medicine New Haven Connecticut USA
6. Section of Rheumatology, Allergy and Immunology Yale University School of Medicine New Haven Connecticut USA
7. Department of Medicine Massachusetts General Hospital Boston Massachusetts USA