HAVCR2 and Pancytopenia: We also found low T‐cell immunoglobulin and mucin‐containing domain (TIM)‐3 expression in NK cells in newly‐diagnosed patients with SAA compared with healthy controls and a negative correlation of TIM‐3 expression with the severity of pancytopenia, which further laid the theoretical foundation for improving the efficacy of NK cell reinfusion for SAA treatment.