Subjects are studied on 4 different days in randomized order, with an oral glucose tolerance test (OGTT) and glucose clamps + infusions of GLP-1, GIP and NaCl before and immediately after 5 days treatment with dexamethasone, 2mg bid. On day 1, 2 and 3 after the 5 days of dexamethasone, 2mg dexamethasone was given in the afternoon after the tests to ensure unchanged insulin resistance