virus production occurred only in the fibroblastic diploid cell lines : hef ( human embryonic cells , flow # 5,000 ) and hfdl # 645 ( human fetal diploid lung ) , but not in the epithelial-like heteroploid cell lines : ra ( a continuous line of human amnion ) , # 999 ( human bone marrow ) , and kb ( carcinoma of the nasopharynx ) .
C0014597
epithelial
C2931822
carcinoma of the nasopharynx