Unsupervised clustering analysis identified a cluster of a CD4+ T-lymphocyte subset-expressing FKBP51 and Ki-67 that was more prevalent in obese participants with asthma (2.6% of CD3+ T-lymphocytes) compared with normal weight participants (1.1% of CD3+ T-lymphocytes, Supplementary Figure S3). Here, FKBP4 is linked to asthma.