1. Department of Endocrinology & Metabolic Disease; The 3rd Affiliated Hospital of Sun Yat-sen University
2. Guangdong Diabetes Center; Guangzhou
3. The 1st Affiliated Hospital of Shenzhen University; Shenzen
4. Affiliated Hospital of Guangdong Medical College; Zhanjiang
5. The 1st Affiliated Hospital of Shantou University Medical College; Shantou
6. Zhuhai People's Hospital; Zhuhai
7. Huizhou Municipal Central Hosptial; Huizhou
8. Qingyuan People's Hospital; Qingyuan
9. Dongguan People's Hospital; Dongguan
10. Yue Bei People's Hospital; Shaoguan
11. Foshan Hospital of Traditional Chinese Medicine; Foshan
12. Zhongshan People's Hospital; Zhongshan
13. Jiangmen Central Hospital; Jiangmen
14. Guangzhou 1st Municipal People's Hospital; Guangzhou
15. Shenzhen People's Hospital; Shenzhen
16. Jieyang People's Hospital; Jieyang
17. Meizhou People's Hospital; Meizhou
18. Maoming People's Hospital; Maoming China