Moreover, the single inhibitory killer cell immunoglobulin-like receptor (KIR) positive NK cell subsets CD158a/KIR2DL1, CD159b/KIR2DL2, and CD158e/KIR3DL1 were compared with regard to the overall degranulation capacity to address the impact of the KIR receptor ligand model (KIR R/L) in neuroblastoma. Here, KIR2DL1 is linked to neuroblastoma.