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Preston-Martin S, Thomas DC, White SC, Cohen D.Preston-Martin S, et al.J Natl Cancer Inst. 1988 Aug 17;80(12):943-9. doi: 10.1093/jnci/80.12.943.J Natl Cancer Inst. 1988.PMID: 3398070
Preston-Martin S, Pike MC, Ross RK, Jones PA, Henderson BE.Preston-Martin S, et al.Cancer Res. 1990 Dec 1;50(23):7415-21.Cancer Res. 1990.PMID: 2174724