IL1RL1 and asthma: Resequencing of the chromosome 2 region containing IL1RL1 in 200 pooled severe asthma patient DNA samples (Genetics of Asthma Severity and Phenotypes [GASP]) and 200 pooled nonasthmatic, nonallergic subject DNA samples (Nottingham Gedling Cohort) identified a total of 4107 variants, of which 1899 were designated as valid variant calls (Supplemental Table 1).