Aims
Genetic variants of pulmonary surface glycoproteins like Muc5a and Muc5b are known to affect mucociliary clearance, control of infections and maybe associated with pulmonary fibrosis [1–3]. We tested the hypothesis that Muc5b (rs35705950) is associated with bronchopulmonary dysplasia (BPD) in mechanically ventilated preterm infants. In addition, we aimed to identify common variants associated with the need for surfactant treatment.