Damned if you do, damned if you don't: subgroup analysis and equity.
Petticrew, Mark; Tugwell, Peter; Kristjansson, Elizabeth; Oliver, Sandy; Ueffing, Erin; Welch, Vivian; Journal of Epidemiology & Community Health, 2012, vol. 66, issue 1, p 95, ISSN 0143005x. ISBN 14702738.

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