[1] Univ Leipzig, Inst Clin Chem & Pathobiochem, D-04103 Leipzig, Germany
[2] Univ Tubingen, Inst Organ Chem, D-7400 Tubingen, Germany
[3] Univ Dusseldorf, Diabet Res Inst, D-4000 Dusseldorf, Germany
[4] CTL Cell Technol GmbH, Bohlitz Ehrenberg, Germany
[5] Univ Leipzig, Childrens Hosp, D-7010 Leipzig, Germany
[6] Univ Tubingen, Childrens Hosp, Tubingen, Germany