[1] University of Porto,Department of Health Information and Decision Sciences, Faculty of Medicine
[2] Al. Prof. Hernâni Monteiro,Department of Pathology, Faculty of Medicine
[3] Universidade Agostinho Neto,CINTESIS
[4] University of Porto, Center for Research in Health Technologies and Information Systems
[5] University Nova de Lisboa,National School of Public Health
[6] University of Porto,Department of Infectious Diseases, Faculty of Medicine