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Journal of Clinical Epidemiology > 1998 > 51 > 2 > 107-118
European Journal of Cancer > 1996 > 32 > 8 > 1354-1358
Journal of Clinical Epidemiology > 1998 > 51 > 2 > 107-118
European Journal of Cancer > 1996 > 32 > 8 > 1354-1358