TY - JOUR AB - Article PDF first page preview Close This content is only available as a PDF. © Oxford University Press TI - NCI Publications JF - JNCI: Journal of the National Cancer Institute DO - 10.1093/jnci/82.8.721-b DA - 1990-04-18 UR - https://www.deepdyve.com/lp/oxford-university-press/nci-publications-GXf4BUT94m SP - 721 EP - 721 VL - 82 IS - 8 DP - DeepDyve ER -