Impaired Glucose Tolerance

• The First Affiliated Hospital of Anhui Medical University — Hefei, Anhui, China
• Beijing Chuiyangliu Hospital — Beijing, Beijing Municipality, China
• China Meitan General Hospital — Beijing, Beijing Municipality, China
• Beijing Anzhen Hospital of The Capital University of Medical Sciences — Beijing, Beijing Municipality, China

• Purdue University — West Lafayette, Indiana, United States

• Paediatric Research Facility; The Children's Hospital at Uppsala University Hospital — Uppsala, Uppsala County, Sweden

• UCLA General Clinical Research Center (GCRC) — Los Angeles, California, United States

Not specified

• Walter Reed National Military Medical Center — Bethesda, Maryland, United States

Not specified

• Glycemic Index Laboratories, Inc — Toronto, Ontario, Canada

• Carl T. Hayden VA Medical Center — Phoenix, Arizona, United States
• USC-Keck School of Medicine — Los Angeles, California, United States
• University of California San Diego-San Diego VA Medical Center — San Diego, California, United States
• Georgetown University — Washington D.C., District of Columbia, United States

• University Hospital Örebro — Örebro, Sweden