Activated Toxicity of Diesel Particulate Extract by Ultraviolet A Radiation in Mammalian Cells: Role of Singlet Oxygen. - Lingzhi Bao; An Xu; Liping Tong; Shaopeng Chen; Lingyan Zhu; Ye Zhao; Guoping Zhao; Erkang Jiang; Jun Wang; Lijun Wu (Environmental Health Perspectives, 2009)