National Center for Biotechnology Information NCBI NLM MEDLINE humans pubmed abstract nih national institutes of health national library of medicine models research support non-u.s. gov't body mass index reference values glucose / metabolism kinetics diabetes mellitus biological* insulin / blood insulin / metabolism insulin secretion thinness type 2 / physiopathology type 2 / blood* pmid:11289482 doi:10.2337/diacare.24.3.539 a mari g pacini j j nolan glucose clamp technique glucose intolerance / blood* glucose intolerance / physiopathology glucose tolerance test* islets of langerhans / metabolism obesity / blood*