1. Department of Oral Medicine, Beijing Hospital for Stomatology; Capital Medical University; Beijing PR China
2. Cancer Research Program, Julius L. Chambers Biomedical Biotechnology Research Institute; North Carolina Central University; Durham USA
3. Division of Medical Oncology, Department of Internal Medicine; The Ohio State University; Columbus OH USA
4. Centre for Oral Health Research, School of Dental Sciences; Newcastle University; Newcastle upon Tyne UK
5. Institute of Human Genetics, Newcastle University; International Centre for Life; Newcastle upon Tyne UK
6. Division of Gastroenterology, Department of Medicine; Duke University; Durham NC USA
7. Center for Gastrointestinal Biology and Disease, Division of Gastroenterology and Hepatology, Department of Medicine; University of North Carolina at Chapel Hill; Chapel Hill NC USA