... takeresponsibility for the integrity of the data and the accuracy of the dataanalysis. Study concept and design: CJC, LIH. Acquisition of data: CJC, LIH,WPC, YHC, WCL.Analysis and interpretation of data: ... fundingorganization played a role in the design and conducted of this study;collection, management, analysis, and interpretation of the data; orpreparation, review, and approval of the manuscript.Received: ... association may partly explain the discre-pancies of these studies. The other possibility for thesediscrepancies may due to markedly difference of e xpo-sure level among these studies. We noticed the...