1. Duke Molecular Physiology Institute, Duke University School of Medicine Duke University Durham North Carolina USA
2. Department of Orthopaedic Surgery, Duke University School of Medicine Duke University Durham North Carolina USA
3. Department of Pathology Duke University Medical Center Durham North Carolina USA
4. Center for Electron Microscopy and Nanoscale Technology, Duke University School of Medicine Duke University Durham North Carolina USA
5. Department of Medicine, Duke University School of Medicine Duke University Durham North Carolina USA