[1] Univ Geneva, Fac Med, Ctr Med Univ CMU, Dept Cell Physiol & Metab, CH-1211 Geneva, Switzerland
[2] Univ Geneva, Ctr Diabet, Fac Med, CH-1211 Geneva, Switzerland
[3] Univ Hosp Geneva, Ctr BioMed Imaging CIBM, CH-1211 Geneva, Switzerland
[4] Univ Bern, Inst Infect Dis, CH-3010 Bern, Switzerland
[5] Univ Hosp Geneva, Div Radiol, CH-1211 Geneva, Switzerland
[6] Swiss Fed Inst Technol, Inst Mol Syst Biol, CH-8093 Zurich, Switzerland
[7] Univ Coll London UCL, Inst Struct & Mol Biol, Div Biosci, London WC1E 6BT, England