1. Department of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA.
2. Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA.
3. Research Service of the Ralph H. Johnson Veterans Affairs Medical Center, Charleston, SC 29401, USA.
4. Department of Medicine, Duke University Medical Center, Durham, NC 27710, USA.
5. Department of Biochemistry and Molecular Medicine, Institute for Research in Immunology and Cancer, University of Montreal, Montreal, Quebec H3C IJ4, Canada.
6. Department of Biochemistry, Duke University Medical Center, Durham, NC 27710, USA.
7. Department of Medicine, Research Institute of the McGill University Health Center, McGill University, Montreal, Quebec H4A 3J1, Canada.
8. Physiologie de la Reproduction et des Comportements, Institut National de la Recherche Agronomique, CNRS, Université de Tours, 37380 Nouzilly, France.
9. Department of Cell Biology, Duke University Medical Center, Durham, NC 27710, USA.
10. Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, NC 27710, USA.
11. Howard Hughes Medical Institute, Duke University Medical Center, Durham, NC 27710, USA.