Am J Surg Pathol 2017 Nov;41(11):1483-1490
Departments of *Stem Cell Transplantation and Cellular Therapy †Pathology ‡Gastroenterology, The University of Texas M.D. Anderson Cancer Center §Department of Pediatric Oncology, Baylor College of Medicine, Houston, TX ∥Department of Medicine, Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, CA.