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Bata IR, Eastwood BJ, Gregor RD, Guernsey JR, Klassen GA, MacKenzie BR, Wolf HK.Bata IR, et al. Among authors: guernsey jr.J Clin Epidemiol. 1997 Jul;50(7):787-91. doi: 10.1016/s0895-4356(97)00067-x.J Clin Epidemiol. 1997.PMID: 9253389
Holtby CE, Guernsey JR, Allen AC, Vanleeuwen JA, Allen VM, Gordon RJ.Holtby CE, et al. Among authors: guernsey jr.Int J Environ Res Public Health. 2014 Feb 5;11(2):1803-23. doi: 10.3390/ijerph110201803.Int J Environ Res Public Health. 2014.PMID: 24503976Free PMC article.