One research group examined DNA samples from BPD patients from different populations (Northern Finnish, Canadian, and Hungarian) to compare 44 SNPs in the IL-6, IL-6R, and gp130 (IL-6ST), IL-10, tumor necrosis factor (TNF), and glucocorticoid receptor (NR3C1) genes, but failed to identify associations with BPD susceptibility (121). Here, IL6 is linked to bronchopulmonary dysplasia.