Circulating levels of tumor necrosis factor-alpha, brain natriuretic peptide and cardiac troponin I upon admission and 31-day mortality in patients with acute decompensated chronic heart failure - Zairis, M; Apostolatos, C; Papadopoulos, J; Xenos, D; Stefanatos, L; Manolis, AJ; Cokkinos, D.V.; Foussas, SG (EUROPEAN HEART JOURNAL, 2006)