Diabetes Mellitus, Type 2

• Beijing Huaxin Hospital — Beijing, Beijing Municipality, China
• Peking University Peoples Hospital — Beijing, Beijing Municipality, China
• China Meitan General Hospital — Chaoyang, Beijing Municipality, China
• Beijing Yanhua hospital — Fangshan, Beijing Municipality, China

Not specified

• Research Site — Bucheon-si, South Korea
• Research Site — Busan, South Korea
• Research Site — Daejeon, South Korea
• Research Site — Jeonju, South Korea

• Vancouver Coastal Health Research Institute (VCHRI/VCHA) site -Vancouver General Hospital — Vancouver, British Columbia, Canada

• Colorado State University — Fort Collins, Colorado, United States

• Online study with GfK — Philadelphia, Pennsylvania, United States

• Division of Metabolic Diseases, University Hospital of Padova — Padova, Italy

• University Hospital of Padova — Padova, Italy

• Nanjing Drum Tower Hospital The Affiliated Hospital of Nanjing University Medical School — Nanjing, Jiangsu, China

• Sophiahemmet University — Stockholm, Sweden