1. University of Michigan, Division of Hematology/ Oncology, 1500 E. Medical Center Dr., 7314 CCGC, Ann Arbor, MI 48109-0946, USA, , University of Southern California, Los Angeles, CA, USA
2. Southwest Oncology Group Statistical Center, Seattle, WA, USA
3. University of Colorado, Denver, CO, USA
4. Columbia University, New York, NY, USA
5. University of Washington, Seattle, WA, USA
6. Cleveland Clinic Taussig Cancer Institute, Cleveland, OH, USA
7. University of Southern California, Los Angeles, CA, USA
8. Nevada Cancer Institute, Las Vegas, NV, USA
9. University of Texas Health Science Center at San Antonio, San Antonio, TX, USA