Serum trimethylamine-N-oxide is associated with incident type 2 diabetes in middle-aged and older adults: a prospective cohort study oleh Shu-yi Li, Si Chen, Xiao-ting Lu, Ai-ping Fang, Yu-ming Chen, Rong-zhu Huang, Xin-lei Lin, Zi-hui Huang, Jing-fei Ma, Bi-xia Huang, Hui-lian Zhu