1. Postgraduation Program in Pathology; Universidade Federal de Ciências da Saúde de Porto Alegre (UFSCPA); Porto Alegre Brazil
2. Department of Epidemiological Vigilance; Ministry of Health; Secretary of Health Vigilance; Brasília Brazil
3. Education and Research Centre - University Hospital of South Manchester; Manchester UK
4. Departament of Medicine; Universidade Federal de São Paulo; São Paulo Brazil
5. Molecular Biology Laboratory; Irmandade Santa Casa de Misericórdia de Porto Alegre (ISCMPA); Hospital Dom Vicente Scherer (HDVS); Porto Alegre Brazil