Network for prevention occupational accidents - REPAT: occurence of exposure to biological material at hospitals - Marziale, Maria Helena Palucci; Rocha, Fernanda Ludmilla Rossi; Cenzi, Camila; Cassiolato, Flávio; Felli, Vanda Elisa Andres; Anabuki, Marina; Silva, Everaldo; Costa, Aldenan; Porto, Janete (International Congress on Occupational Health, 2012)