<正>In this study,we sought to determine the association between environmental factors and nonsyndromic cleft of the lip and/or palate(NSCLP)to understand the e
In this study, we searched multiple databases for all relevant original articles (1996-2013). To investigate blood lead levels (BLL) and possible risk factors for l
Objective The number of analyzed outcome variables is important in the statistical analysis and interpretation of research findings. This study investigated pub