1. Current affiliation: Federal University of Vicosa, Vicosa, Brazil.
2. Current affiliation: Superintendency of Control of Endemic Diseases, São Paulo, Brazil.
3. Current affiliation: Hospital and Clinic Oca, Monterrey, Nuevo Leon, Mexico.
4. Current affiliation: Texas A&M University, College Station, Texas, USA.
5. Current affiliation: Federal University of Ouro Preto, Ouro Preto, Brazil.