Unexpected high frequency of neurofibroma in the celiac ganglion of German cattle oleh Insa Dammann, Wiebke M. Wemheuer, Arne Wrede, Wilhelm E. Wemheuer, Amely Campe, Jutta Petschenka, Ulf Schulze-Sturm, Uwe Hahmann, Claus P. Czerny, Pia Münster, Bertram Brening, Lothar Kreienbrock, Christiane Herden, Walter J. Schulz-Schaeffer