1.       MayoClinic, Diabetic Neuropathy: https://www.mayoclinic.org/diseases-conditions/diabetic-neuropathy/symptoms-causes/syc-20371580

2.       NIH, NIDDK: https://www.niddk.nih.gov/health-information/diabetes/overview/preventing-problems/nerve-damage-diabetic-neuropathies/what-is-diabetic-neuropathy

3.       Hormone.org, Diabetic Neuropathy: https://www.hormone.org/diseases-and-conditions/diabetes/diabetes-complications/diabetic-neuropathy

4.       MayoClinic, Diabetic Retinopathy: https://www.mayoclinic.org/diseases-conditions/diabetic-retinopathy/symptoms-causes/syc-20371611

5.       Decision Resource Group (DRG). Diabetic Macular Edema / Diabetic Retinopathy Disease Landscape & Forecast. March 2020

6.       WebMD, A Closer Look at Diabetic Retinopathy: https://www.webmd.com/diabetes/closer-look-diabetic-retinopathy