1. Ferguson Laboratory for Orthopaedic Research; Department of Orthopaedic Surgery; University of Pittsburgh School of Medicine; Pittsburgh; Pennsylvania 15261
2. Department of Microbiology and Molecular Genetics; University of Pittsburgh School of Medicine; Pittsburgh; Pennsylvania 15219
3. Center for Biologic Imaging; Environmental and Occupational Health, Center for Biologic Imaging, University of Pittsburgh; Pittsburgh; Pennsylvania 15261
4. Department of Orthopaedic Surgery; Catholic University of Rome School of Medicine; “A. Gemelli” University Hospital; l.go Agostino Gemelli 8; 00168 Roma; Italy
5. Department of Chemistry and Center for Chemical Methodologies and Library Development; University of Pittsburgh; 219 Parkman Ave. CSC 758; Pittsburgh; Pennsylvania 15260