From the Hematology-Oncology Section, Department of Medicine, Brockton-West Roxbury Department of Veterans Affairs Medical Center, and Beth Israel Hospital, Harvard Medical School, Boston, MA; the Departments of Pediatrics and Pathology and Laboratory Medicine, University of Pennsylvania and The Children's Hospital of Philadelphia, PA; and the Genetics Program, Eastern Maine Medical Center, Bangor, ME. (1997-01-01時点)