[1] Maastricht Univ, Med Ctr, Human Biol & Human Movement Sci, Maastricht, Netherlands
[2] Radbound Univ Nijmegen, Med Ctr, Dept Physiol, Nijmegen, Netherlands
[3] German Diabet Ctr, Inst Clin Biochem & Pathobiochem, Dusseldorf, Germany
[4] Maastricht Univ, Med Ctr, Radiol, Maastricht, Netherlands