1. Zentrum Physiologie, Medizinische Hochschule Hannover, D-30625 Hannover,Germany
2. Department of Gastroenterology, Hepatology and Endocrinology, Medizinische Hochschule Hannover, D-30625 Hannover, Germany
3. IPF PharmaCeuticals GmbH, Feodor-Lynen-Strasse 31, D-30 625 Hannover,Germany
4. Human Genetics Center, University of Texas School of Public Health at Houston, Texas, USA
5. Institute of Medical Technology, University of Tampere and Tampere University Hospital, FIN-33014 Tampere, Finland