Serum levels of seven cytokines in premature ventilated newborns: correlations with old and new forms of bronchopulmonary dysplasia. - Vento G; Capoluongo E; Matassa PG; Concolino P; Vendettuoli V; Vaccarella C; Frezza S; Zuppi C; Romagnoli C; Ameglio F (Intensive care medicine, 2006)