IL6 and bronchopulmonary dysplasia: Like preterm sheep, ventilated very low birth weight (VLBW) infants have increased concentrations of the pro-inflammatory cytokines IL-8, IL-1β, IL-6, and MCP-1 in tracheal aspirates and these increased levels correlate with an increased risk of bronchopulmonary dysplasia (BPD) [3-5].