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Original article can be found at: http://ije.oxfordjournals.org/archive/ Copyright International Epidemiological Association. DOI: 10.1093/ije/31.1.168 Full text of this article is not available in the UHRA
Wareham et al. (Fri,) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: