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Jackson R, Graham P, Beaglehole R, De Boer G.Jackson R, et al. Among authors: graham p.N Z Med J. 1988 Oct 26;101(856 Pt 1):658-60.N Z Med J. 1988.PMID: 3186004
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Graham P, Davis P.Graham P, et al.Community Health Stud. 1990;14(2):138-45. doi: 10.1111/j.1753-6405.1990.tb00034.x.Community Health Stud. 1990.PMID: 2145114