American Diabetes Association (ADA): www.diabetes.org
Mayo Clinic: www.mayoclinic.org/diseases-conditions/diabetes
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK): www.niddk.nih.gov/health-information/diabetes
Centers for Disease Control and Prevention (CDC): www.cdc.gov/diabetes/home/index.html
World Health Organization (WHO): www.who.int/health-topics/diabetes