Dried blood spot testing for the antenatal screening of HTLV, HIV, syphilis, toxoplasmosis and hepatitis B and C: prevalence, accuracy and operational aspects - Boa-Sorte, N; Purificação, A; Amorim, T; Assunção, L; Reis, A; Galvão-Castro, B (Braz J Infect Dis, 2014)