https://www.healthcentral.com/article/bad-insulin-when-to-toss-the-vial
DiabetesMedication

Bad Insulin: When to Toss the Vial

Insulin vials.
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    William Quick, M.D.

    William Quick, M.D.

    Bill Quick, M.D., is a physician who lives with diabetes. He is the editor of www.D-is-for-Diabetes.com and a past president of the American Association of Diabetes Educators. Dr. Quick wrote about diabetes for HealthCentral.