HiatoGast 1 an exploring, semiblinded trial establishing a new endoscopical categorisation of axial hiatal hernias - Eckhardt, Daniel; Engel, Matthias A.; Golcher, Henriette; Krautz, Christian; Grützmann, Robert; Elshafei, Moustafa (Friedrich-Alexander-Universität Erlangen-Nürnberg, 2019)