1. Department of Microbiology
2. Division of Gastroenterology, Hepatology, and Nutrition, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania; and
3. Department of Medicine, and
4. Department of Pathomorphology and Neuropathology and
5. Department of Pulmonology, Medical University of Gdansk, Gdansk, Poland
6. Department of Pathology and Laboratory Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania