1 The First Affiliated Hospital, Department of Laboratory Medicine, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China.
2 The First Affiliated Hospital, Institute of Endocrinology and Metabolism; Center for Clinical Research in Diabetes, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China.
3 The First Affiliated Hospital, Institute of Oncology, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China.