CCL2 and bronchopulmonary dysplasia: We studied IL‐8, MCP‐1, and MIP‐1α, because they are elevated in the tracheal aspirates of infants during the first few days of life who then develop BPD (Munshi, Niu, Siddiq, & Parton, 1997; Niu, Munshi, Siddiq, & Parton, 1998).