Copyright information:Taken from "Temporal Variability of Urinary Phthalate Metabolite Levels in Men of Reproductive Age"Environmental Health Perspectives 2004;112(17):1734-1740.Published online 16 Aug 2004PMCID:PMC1253667.This is an Open Access article: verbatim copying and redistribution of this article are permitted in all media for any purpose, provided this notice is preserved along with the article's original DOI.