References:

1. Society for Endocrinology. Insulin. Available at: https://www.yourhormones.info/hormones/insulin/. Accessed January 2022.
2. Diabetes.co.uk. How to inject insulin. Available at: https://www.diabetes.co.uk/insulin/how-to-inject-insulin.html. Accessed February 2022.
3. American Diabetes Association. When your doctors says it’s time to start insulin. Available at: https://diabetesjournals.org/clinical/article/22/3/151/1652/When-Your-Doctor-Says-It-s-Time-to-Start-Insulin. Accessed February 2022.