The absolute numbers of NKG2D+NK and NKG2A+NK started to increase at 30 days after HSCT in all the three groups; whereas, the absolute number or NKG2D+NK cells at post-HSCT 60 days was significantly decreased in the CMV disease group compared to the CMV reactivation group (p = 0.043) (Figure 3). The gene discussed is KLRK1; the disease is glycogen storage disease VI.