[1] Univ Leipzig, Fac Vet Med, Inst Anat Histol & Embryol, Tierkliniken 43, D-04103 Leipzig, Germany
[2] Free Univ Berlin, Dept Vet Med, Inst Vet Anat, Berlin, Germany
[3] Ludwig Maximilians Univ Munchen, Fac Vet Med, Dept Vet Sci, Chair Anat Histol & Embryol, Munich, Germany
[4] Univ Vet Med Hannover, Inst Anat, Hannover, Germany
[5] Justus Liebig Univ Giessen, Inst Vet Anat Histol & Embryol, Giessen, Germany