1. Department of Pathology; The Johns Hopkins Hospital; Baltimore MD USA
2. Institute of Pathology; Klinikum Bayreuth; Bayreuth Germany
3. Mount Sinai Beth Israel Medical Center; New York NY USA
4. Mayo Clinic; Phoenix AZ USA
5. Capital Digestive Care; Rockville MD USA
6. AmeriPath Indiana; Indianapolis IN USA
7. Jackson Siegelbaum Gastroenterology and PAGI; Camp Hill PA USA