<qa>  What is the name of the NK cell function?Blood samples are collected at baseline and on days 30, 60, and 100 for correlative laboratory studies. Samples are analyzed for killer immunoglobulin-like receptor KIR mismatches by genotyping and immunophenotyping methods PCR and flow cytometry; natural killer NK cell reconstitution by flow cytometry; and NK cell function, NK cell allo-reactivity by ELISPOT and ELISA. 