Plugging of needles with newer insulins.
D003920:Diabetes Mellitus / Q000188:drug therapy; D006801:Humans; D007267:Injections / Q000009:adverse effects; D007328:Insulin / Q000008:administration & dosage*; D009339:Needles / Q000592:standards*; D013594:Syringes / Q000592:standards*
D007328:Insulin