1. INSERM U 314, IFR 53, CHU Maison Blanche, Reims, France
2. Laboratoire Pol Bouin, CHU Maison Blanche, Reims, France
3. Vincent T. Lombardi Cancer Research Center, University Medical Center, Washington
4. Department of Anatomy and Cellular Biology, Tufts University Health Science School, Boston, Massachusetts
5. Departments of Research and Medicine, Veterans Affairs Medical Center, Northport, Massachusetts