Rebecca Abraham,     (373), Department of Pediatrics, Children’s Hospital, University of Texas Medical Branch, Galveston, Texas 77550

R.N. Ashraf,     (247), Department of Social and Preventive Pediatrics, King Edward Medical College, Lahore, Pakistan

Robert D. Baker,     (401), Division of Pediatric Gastroenterology and Nutrition, Department of Pediatrics, University of Massachusetts Medical Center, Worcester, Massachusetts 01655

Susan S. Baker,     (401), Division of Pediatric Gastroenterology and Nutrition, Department of Pediatrics, University of Massachusetts Medical Center, Worcester, Massachusetts 01655

Kim E. Barrett,     (71), Department of Medicine, University of California, San Diego, School of Medicine, San Diego, California 92103

M. Benjamin,     (229), Intestinal Disease Research Unit, Department of Pathology, McMaster University, Hamilton, Ontario, L8N 3Z5, Canada

Helen M. Berschneider,     (25), Department of Anatomy, Physiological Sciences and Radiology, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina 27606

John Bienenstock,     (171), Department of Medicine and Pathology, McMaster University, Hamilton, Ontario L8N 3Z5, Canada

Kurt J. Bloch,     (415), Clinical Immunology and Allergy, Massachusetts General Hospital, Boston, Massachusetts 02114

Per Brandtzaeg,     (295), Laboratory for Immunohistochemistry and Immunopathology (LIIPAT), Institute of Pathology, University of Oslo, The National Hospital, Rikshospitalet, N-0027 Oslo 1, Norway

Lorenz Braun-Elwert,     (129), Universitätsklinikum Steglitz, Medizinische Klinik und Poliklinik, Abteilung für Innere Medizin mit Schwerpunkt Gastroenterologie, Freie Universität Berlin, 1000 Berlin 45, Germany

B. Carlsson,     (247), Department of Clinical Immunology, University of Göteborg, S-413 46 Göteborg, Sweden

Gilbert A. Castro,     (7), Department of Physiology and Cell Biology, University of Texas Medical School, Houston, Texas 77030

Ranjit Kumar Chandra,     (389), Departments of Pediatrics and Medicine, Memorial University of Newfoundland, St. John’s, Newfoundland A1A 1R8, Canada

Eugene B. Chang,     (43), Department of Medicine, Section of Gastroenterology, University of Chicago, Chicago, Illinois 60637

S.E. Crowe,     (229), Intestinal Disease Research Unit, Department of Pathology, McMaster University, Hamilton, Ontario L8N 3Z5, Canada

J.R. Cruz,     (247), INCAP, Guatemala City, Guatemala

U. Dahlgren,     (247), Department of Clinical Immunology, University of Göteborg, S-413 46 Göteborg, Sweden

Claudio Fiocchi,     (145), Department of Gastroenterology and Research Institute, Cleveland Clinic Foundation, Cleveland, Ohio 44195

D. Grant Gall,     (59), Departments of Pediatrics and Medicine, University of Calgary, Calgary, Alberta, T2H 4N1 Canada

T. Gonzales-Cossio,     (247), INCAP, Guatemala City, Guatemala

M. Hahn-Zoric,     (247), Department of Clinical Immunology, University of Göteborg, S-413 46 Göteborg, Sweden

Trond S. Halstensen,     (295), Laboratory for Immunohistochemistry and Immunopathology (LIIPAT), Institute of Pathology, University of Oslo, The National Hospital, Rikshospitalet, N-0027 Oslo 1, Norway

L.Å. Hanson,     (247), Department of Clinical Immunology, University of Göteborg, S-413 46 Göteborg, Sweden

Paul R. Harmatz,     (415), Children’s Hospital, Gastroenterology Division, Oakland, California 94609

V. Héarias,     (247), Department of Clinical Immunology, University of Göteborg, S-413 46 Göteborg, Sweden

Mette Hvatum,     (295), Laboratory for Immunohistochemistry and Immunopathology (LIIPAT), Institute of Pathology, University of Oslo, The National Hospital, Rikshospitalet, N-0027 Oslo 1, Norway

F. Jalil,     (247), Department of Social and Preventive Pediatrics, King Edward Medical College, Lahore, Pakistan

Stephen P. James,     (129), Division of Gastroenterology, Department of Medicine, University of Maryland at Baltimore, Baltimore, Maryland 21201

J. Karlberg,     (247), Department of Anatomy (Biometric Unit), University of Göteborg, S-413 46 Göteborg, Sweden

O. Koldovský,     (269), Department of Pediatrics, Steele Memorial Research Center, and Department of Physiology, University of Arizona, College of Medicine, Tucson, Arizona 85724

W. Kong,     (269), Department of Pediatrics, Steele Memorial Research Center, and Department of Physiology, University of Arizona, College of Medicine, Tucson, Arizona 85724

U. Kosecka-Janiszewska,     (229), Intestinal Disease Research Unit, Department of Pathology, McMaster University, Hamilton, Ontario L8N 3Z5, Canada

Dag Kvale,     (295), Laboratory for Immunohistochemistry and Immunopathology (LIIPAT), Institute of Pathology, University of Oslo, The National Hospital, Rikshospitalet, N-0027 Oslo 1, Norway

B.S. Lindblad,     (247), Department of Pediatrics, St. Göran’s Hospital, Karolinska Institute, Stockholm, Sweden

Richard P. MacDermott,     (365), Gastroenterology Division, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104

Thomas T. MacDonald,     (99), Department of Paediatric Gastroenterology, St. Bartholomew’s Hospital, London EC1A 7BE, England

James L. Madara,     (119), Division of Gastrointestinal Pathology, Department of Pathology, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts 02115

S. Masson,     (229), Intestinal Disease Research Unit, Department of Pathology, McMaster University, Hamilton, Ontario L8N 3Z5, Canada

Toshihiro Matsuura,     (145), First Department of Internal Medicine, Nagoya University School of Medicine, Nagoya, Japan

I. Mattsby-Baltzer,     (247), Department of Clinical Bacteriology, University of Göteborg, S-413 46 Göteborg, Sweden

Lloyd Mayer,     (111), Division of Clinical...