[Glucocorticoids and glucose metabolism. 3. Comparative studies on the influence of prednisolone-Na-hemisuccinate, 16-methylene-prednisolone monophosphate, 6-alpha-chloroprednisolone-Na-hemisuccinate, dexamethasone Na-hemisulfate and 9-alpha-fluoro-16-alpha-hydroxyprednisolone acetate on glucose tolerance].