1. Key Laboratory of Systems and Control, Academy of Mathematics and Systems Science; Chinese Academy of Sciences; Beijing 100190 P.R. China
2. Department of Biostatistics; St. Jude Children's Research Hospital; Memphis TN 38105 USA
3. Department of Statistics and Probability; Michigan State University; East Lansing MI 48824 USA
4. Department of Genetics, Department of Biostatistics; University of North Carolina; Chapel Hill NC 27599 USA
5. Department of Computer Science; University of North Carolina; Chapel Hill NC 27599 USA
6. Johns Hopkins Medical Institute; Baltimore MD 21231 USA
7. Department of Pharmaceutical Sciences; St. Jude Children's Research Hospital; Memphis TN 38105 USA
8. Department of Oncology; St. Jude Children's Research Hospital; Memphis TN 38105 USA
9. Department of Pediatrics; University of Tennessee Health Science Center; Memphis TN 38163 USA
10. University of Colorado School of Medicine and Children's Hospital Colorado; Aurora CO 80045 USA
11. Department of Bone Marrow Transplantation and Cellular Therapy; St. Jude Children's Research Hospital; Memphis TN 38105 USA