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Material Deleted.—In the Marginal Comment entitled "Regression and Clinical Research," published in the June issue of the Journal (134:549-552, 1980), material was left out of the first sentence of the last paragraph, page 551; it should have read as follows: "One challenge to researchers is to distinguish whether a sample is indeed from an extreme tail of a distribution."
CORRECTION. Am J Dis Child. 1980;134(8):746. doi:10.1001/archpedi.1980.02130200016006
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