Causal role of immune cells in alopecia areata: A two‐sample Mendelian randomization study

Previous research has highlighted an association between alopecia areata (AA) and the collapse of hair follicle immune privilege, however, the causal linkage to specific immune cell traits remains to be elucidated. This study aimed to investigate the causal influence of immune cell traits on AA utilizing a two‐sample Mendelian randomization (MR) approach.