1. Department of Oncology Georgetown University Medical Center Washington D.C. 20007 USA
2. Human Genome Sciences Rockville Maryland 20850 USA
3. Laboratory of Molecular Biotechnology, Department of Biochemistry Universiteitsplein 1 Wilrijk Belgium
4. Department of Biology Xiamen University China
5. Laboratory of Molecular Biology (Celgen) and Department of Cell Growth, Differentiation and Development, Flanders Interuniversity Institute of Biotechnology (VIB) University of Leuven Leuven Belgium
6. Department of Radiology Rochester University Medical Center Rochester New York 14642 USA