Urinary tobacco-specific nitrosamine 4-(methylnitrosamino)-1-( 3-pyridyl)-1-butanol (NNAL) and cognitive functioning in older adults: The National Health and Nutrition Examination... oleh Song Ge<sup>+<sup/>, Weixia Ma<sup>+<sup/>, Zhe Qu, Xingmei Zhu, Zijing Chen, Xuechun Lin, Zhenmei Fu