1 CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
2 Liaoning Province Key Laboratory of Metabolomics, Dalian 116023, China.
3 Department for Diagnostic Laboratory Medicine, Institute for Clinical Chemistry and Pathobiochemistry, University Hospital Tübingen, 72076 Tüebingen, Germany.
4 Institute for Diabetes Research and Metabolic Diseases, Helmholtz Zentrum München, University of Tübingen, 72076 Tübingen, Germany.
5 German Center for Diabetes Research (DZD), 90451 Nuremberg, Germany.