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Preusser DF, Williams AF, Lund AK, Zador PL.Preusser DF, et al. Among authors: williams af.Accid Anal Prev. 1990 Aug;22(4):391-7. doi: 10.1016/0001-4575(90)90054-o.Accid Anal Prev. 1990.PMID: 2222703
Preusser DF, Lund AK, Williams AF, Blomberg RD.Preusser DF, et al. Among authors: williams af.Accid Anal Prev. 1988 Aug;20(4):245-50. doi: 10.1016/0001-4575(88)90052-8.Accid Anal Prev. 1988.PMID: 3415757