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; and
6. Department of Radiology, Rochester University Medical Center, Rochester, New York 14642, USA;