Exhaled breath condensate collection for nitrite dosage: a safe and low cost adaptation - Reis, Graziela Saraiva; Augusto, Viviane dos Santos; Souza, Maria Eliza Jordani de; Baldo, Caroline Floreoto; Rodrigues, Alfredo José; Evora, Paulo Roberto Barbosa (Acta Cirúrgica Brasileira, 2010)