ARID2 and chronic obstructive pulmonary disease: Genome-wide linkage screens aimed to identify disease-susceptibility genes previously identified three linkage regions (chromosomes 2q33-36, 8pter-22, and 12p13-12) in the Boston Early-Onset COPD cohort [37] which includes the locus for one of the novel genes identified in our study, AT-rich domain 2 (ARID2).