1. Department of Veterinary Anatomy, Histology and Embryology; Justus-Liebig-University; Giessen; Germany
2. Department of Surgery, Faculty of Veterinary Medicine and Animal Science; University of Sao Paulo; Sao Paulo; Brazil
3. Morphology Laboratory of Veterinary Medicine College; UNIFEOB; São João da Boa Vista; Brazil
4. Department of Morphological Sciences; Universidade Anhembi Morumbi; São Paulo; Brazil
5. Department of Veterinary Medicine, FZEA; University of Sao Paulo; Pirassununga; São Paulo; Brazil