<qa>  What type 1 diabetes model was previously implanted with?This research is being done to find out whether subjects previously treated with the implantable insulin pump IIP therapy, and now taking insulin by injection, will benefit from re-implantation of IIP. The investigators will see if IIP causes more stable control of blood sugar, with fewer highs and lows. People with type 1 diabetes previously implanted with the MiniMed Implantable Pump MIP model 2000 at Johns Hopkins may join this study. 