1 Gastroenterologische Gemeinschaftspraxis Aschaffenburg, Klinikum Aschaffenburg-Alzenau, Academic Teaching Hospital of the University of Würzburg, Aschaffenburg, Germany.
2 Institute of Pathology, Klinikum Aschaffenburg-Alzenau, Academic Teaching Hospital of the University of Würzburg, Aschaffenburg, Germany.
3 Institute of Pathology, University of Würzburg, Würzburg, Germany.