Gisele Fabrino Machado*, Maria-Gisela Laranjeira, Augusto Schweigert and Guilherme Dias de Melo
* Corresponding author: Gisele Fabrino Machado giselem@fmva.unesp.br
BMC Veterinary Research 2012, 8:246 doi:10.1186/1746-6148-8-246
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