| Affiliation: | Division of General Surgery, Department of Surgery, The Mercy Hospital of Pittsburgh, Pittsburgh, PA, USA;Division of Diagnostic Radiology Bowman Gray School of Medicine Winston-Salem, N. C. 27103 USA;Stanford University Stanford, Calif. USA;Department of Medicine, Harlem Hospital Center, College of Physicians and Surgeons of Columbia University, New York, New York;Department of Allergy and Immunology, University of Michigan, Ann Arbor, Michigan;Children’s Hospital of Philadelphia, Philadelphia, PA |
