We speculate that, given the key role of TSP-1 in alveolar differentiation and lung repair, the observed difference in the haplotype distribution of THSB1 gene variants between the no-BPD and BPD groups may indicate the difference in downstream expression for the haplotype combination that may preserve the lung development and repair processes in preterm infants. Here, THBS1 is linked to bronchopulmonary dysplasia.