1. From the Departments of Pathology (M.O., J.J.C.) and Gastroenterology (T.M.L.), MedStar Georgetown University Hospital, and Lombardi Comprehensive Cancer Center, Georgetown University Medical Center (E.D., A.U.) — both in Washington, DC; the Genomic Testing Cooperative, Irvine, CA (M.A.); the National Institutes of Health, Bethesda, MD (S.P.); and Brigham and Women’s Hospital (S.S.), the Jerome Lipper Multiple Myeloma Center, Dana–Farber Cancer Institute (K.C.A.), and Harvard Medical School (P.A.) —...