1. Institute of Pathology; Medical University of Graz; Graz Austria
2. Institute of Pathology; Ludwig-Maximilian University of Munich; Munich Germany
3. Department of Internal Medicine; Division of Oncology; Medical University of Graz; Graz Austria
4. 2nd Department of Pathology; Semmelweis University of Budapest; Budapest Hungary
5. Institute for Medical Informatics Statistics and Documentation; Medical University of Graz; Graz Austria
6. Department of Internal Medicine; Division of Gastroenterology and Hepatology; Medical University of Graz; Graz Austria