HLA-DQA1 and asthma: We fine mapped this region using a specific method to impute a total of 172 common HLA classical alleles from 3 class I genes (-A, -B, -C) and four class II genes (-DPB1, -DQA1, -DQB1, -DRB1) and assessed their association with asthma susceptibility (Supplementary Table S2).