1. Sarcoma Services, Department of Orthopaedics and Center for Children's Cancer Research, Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, Utah
2. Department of Human Genetics, Howard Hughes Medical Institute, University of Utah, 15 North 2030 East Room 5440, Salt Lake City, Utah 84112‐5331
3. Scientific Computing and Imaging Institute, University of Utah, Salt Lake City, Utah
4. School of Computing, University of Utah, Salt Lake City, Utah