Serum levels of advanced glycation end products (AGEs) are independently correlated with circulating levels of dipeptidyl peptidase-4 (DPP-4) in humans - Tahara, Nobuhiro; Yamagishi, Sho-ichi; Takeuchi, Masayoshi; Tahara, Atsuko; Kaifu, Kumiko; Ueda, Seiji; Okuda, Seiya; Imaizumi, Tsutomu (Clinical Biochemistry, 2013)