Hornung added that almost half of the learners who tan reported doing this to relax, which is a solid motivating factor that has been noted by numerous research examining tanning behaviors and also is consistent with other addictive methods. ‘The fact that tanning may be addictive for a few individuals should fortify the argument for stricter rules on the indoor tanning industry,’ stated Dr. Hornung. ‘Education alone is not enough to stop high-risk tanning behavior, and skin cancer rates will continue to increase markedly without appropriate intervention.’..Donor KIR2DS1 and AML Relapse We found a significantly reduced risk of relapse among individuals with AML whose donors were positive for KIR2DS1, in comparison with patients whose donors were negative for KIR2DS1 .). We hypothesized that this association will be observed only for donors with HLA-C1, not really for donors with HLA-C2/C2, as the presence of high degrees of the HLA-C2 self-ligand in the latter donors would tolerize KIR2DS1-bearing NK cells and diminish their activity. Allografts from KIR2DS1-positive donors with HLA-C2/C2 were associated with an elevated price of AML relapse, in comparison with all allografts from KIR2DS1-adverse donors . In contrast, allografts from KIR2DS1-positive donors with HLA-C1/C1 were associated with a decreased rate of relapse, in comparison with all allografts from KIR2DS1-harmful donors .