Expression analysis was performed as previously described.50 (link) NKp30, NKp44, NKp46, DNAM-1, and CD161 transcripts were determined with specific primers in end-point PCR using 5´FAM-labeled reverse primers (primers and protocols can be obtained on request). PCR products were analyzed for fragment length in an ABI sequencer with Gene Scan-600 LIZ for length standard and GeneMapper software (both Applied Biosystems, Germany); mean fluorescence intensity (MFI) was used for semiquantitative analysis.