Mello, R. R. de; Dutra, M. V. P.; Ramos, J. R.; Daltro, P.; Boechat, M.; Lopes, J. M. de A. Neonatal Risk Factors for Respiratory Morbidity During the First Year of Life Among Premature Infants. Sao Paulo Med J 2006, 124, 77-84.