[1
]Department of Internal Medicine, University of Michigan, Ann Arbor
[2
]Cancer Research and Biostatistics, Seattle, Washington
[3
]Department of Pathology, University of Michigan, Ann Arbor
[4
]Department of Hematology/Oncology, Fox Chase Cancer Center, Philadelphia, Pennsylvania
[5
]Department of Sarcoma Medical Oncology, University of Texas MD Anderson Cancer Center,
Houston
[6
]Summit Cancer Centers, Post Falls, Idaho
[7
]Department of Medicine, Massachusetts General Hospital, Boston
[8
]Georgia Cancer Specialists, Sandy Springs
[9
]Department of Medicine, University of Pennsylvania School of Medicine, Philadelphia
[10
]Department of Medicine, Stanford Cancer Institute, Stanford, California
[11
]Department of Medical Oncology and Therapeutics Research, City of Hope Medical Center,
Duarte, California
[12
]Department of Medicine, Indiana University, Indianapolis
[13
]Cedars-Sinai Medical Center, Los Angeles, California
[14
]Medstar Washington Hospital Center, Washington, DC
[15
]Department of Pediatrics, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins
University, Baltimore, Maryland
[16
]Department of Oncology, Mayo Clinic, Rochester, Minnesota
[17
]Sarcoma Alliance for Research Through Collaboration, Ann Arbor, Michigan