Efficacy and safety of aprotinin use for reoperative valvular surgery - Rodrigues, Alfredo José; Évora, Paulo Roberto Barbosa; Basseto, Solange; Luciano, Paula M.; Alves Júnior, Lafaiete; S. Filho, Adilson; Vicente, Walter Villela de Andrade (Annals of Thoracic Surgery, 2007)