[1] Univ Gothenburg, Sahlgrenska Acad, Inst Neurosci & Physiol, Dept Physiol Metab Phys, SE-40530 Gothenburg, Sweden
[2] Inst Expt Med, Lab Endocrine Neurobiol, H-1083 Budapest, Hungary
[3] Univ Gothenburg, Sahlgrenska Acad, Inst Neurosci & Physiol, Dept Physiol Endocrinol, SE-40530 Gothenburg, Sweden
[4] Univ Cambridge, Cambridge Inst Med Res, Cambridge CB2 2XY, England
[5] Univ Cambridge, Wellcome Trust, MRC, Inst Metab Sci, Cambridge CB2 2XY, England