Affiliation: | (1) Department of Surgery, The Children's Hospital, Department of Pathology, Brigham and Women's Hospital, 02115 Boston, Massachusettes;(2) Department of Anatomy and Cell Biology, Harvard Medical School, 02115 Boston, Massachusettes;(3) Department of Pathology, Yale University School of Medicine, 06510 New Haven, Connecticut;(4) Enders 1021, Surgical Research Laboratory, Children's Hospital, 300 Longwood Ave, 02115 Boston, MA |