MBL2 and chronic obstructive pulmonary disease: Serum MBL was not associated with COPD duration, age, BMI, GOLD stage, post-FEV1% predicted, SGRQ total score, arterial hypertension, MBL2 H/L allele, MBL2 exon 1 polymorphisms (A/A, vs. A/O, O/O) (p > 0.05).