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BMC Medical Research Methodology > 2016 > 16 > 1 > 1-8
Journal of Clinical Epidemiology > 2014 > 67 > 4 > 425-432
Journal of Clinical Epidemiology > 2010 > 63 > 5 > 491-501
BMC Medical Research Methodology > 2016 > 16 > 1 > 1-8
Journal of Clinical Epidemiology > 2014 > 67 > 4 > 425-432
Journal of Clinical Epidemiology > 2010 > 63 > 5 > 491-501