Beth A. McCormick^1,2, Samuel I. Miller³, and James L. Madara^1,2.

¹ Departments of Pathology, Brigham and Women's Hospital, and Harvard Medical School, Boston, MA 02115

² The Harvard Digestive Diseases Center

³ Departments of Medicine and Microbiology, University of Washington, Seattle, WA 98195.

Received 06/19/96; Accepted 07/09/96; On-line 08/01/96

6. ACKNOWLEDGMENTS

These studies were suppored by National Insitiute of Health grants DK50989 to B.A. McCormick, DK47662 to J.L. Madara, and AI30479 to S.I. Miller.