1. Department of Genetics and Pathology; International Hereditary Cancer Center, Pomeranian Medical University; Połabska 4 Szczecin 70-115 Poland
2. Discipline of Medical Genetics; School of Biomedical Sciences; Faculty of Health; University of Newcastle and the Hunter Medical Research Institute; Newcastle NSW 2308 Australia
3. Division of Heath Care Ministry of Internal Affairs and Administration; Laboratory of Endoscopy; Jagiellońska 44 Szczecin 70-382 Poland
4. Department of General and Oncological Surgery; Pomeranian Medical University; Al. Powstańców Wlkp. 72 70-111 Poland Szczecin