1. Department of Bioengineering, Rice University, 6100 Main Street, Houston, Texas 77005, United States
2. Department of Imaging Physics, The University of Texas M.D. Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, Texas 77030, United States
3. Department of Leukemia, The University of Texas M.D. Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, Texas 77030, United States