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Dyfyniad Arddull Chicagovon Elm, E., DG Altman, M. Egger, SJ Pocock, P. Gøtzsche, J. Vandenbroucke, and STROBE initiative. The Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) Statement: Guidelines for Reporting Observational Studies. Elsevier, 2007.
Dyfyniad MLAvon Elm, E., et al. The Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) Statement: Guidelines for Reporting Observational Studies. Elsevier, 2007.
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