1. Graduate Program in Animal Science, Federal University of Vale do São Francisco, Petrolina, Brazil
2. Graduate Program in Animal Production, Federal University of Rio Grande do Norte, Natal, Brazil
3. Program in Animal Science, Goiano Federal Institute, Rio Verde, Brazil
4. Postgraduate Studies in Tropical Animal Science, Federal University of Piauí, Bom Jesus, Brazil
5. Undergraduate degree in Animal Science, Rural Federal University of Pernambuco, Recife, Brazil