1. Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Carl-Neuberg-Strasse 1, 30625 Hannover, Germany
2. Hannover Medical School, Hanover, Germany
3. Roche Molecular Systems Inc., Roche Diagnostics, Pleasanton, CA, USA
4. Covance Central Laboratory Services SA, Geneva, Switzerland
5. University Hospital, Frankfurt, Frankfurt am Main, Germany
6. Department of Laboratory Medicine, National Cancer Center, Goyang, Republic of Korea
7. Korea University College of Medicine, Seoul, Republic of Korea