Undisclosed human immunodeficiency virus risk factors identified through a computer-based questionnaire program among blood donors in Brazil - Blatyta, Paula Fraiman; Custer, Brian; Gonçalvez, Thelma Terezinha; Birch, Rebecca; Lopes, Maria Esther; Ferreira, Maria Ines Lopes; Proietti, Anna Barbara Carneiro; Sabino, Ester Cerdeira; Page, Kimberly; Almeida-Neto, Cesar de (Transfusion, 2013)