Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) FUKUI A.,Natural killer cell subpopulations and cytotoxicity for infertile patients undergoing in vitro fertilization,Am. J. Reprod. Immunol.,,,1999,41,,413-422,https://cir.nii.ac.jp/crid/1570009751311006336,