Transient hyperglycemia at admission and acute ischemic stroke severity and short-term outcome K. Tziomalos, P. Dimitriou, S. D. Bouziana, M. Spanou, S. Kostaki, S. Angelopoulou, M. Papadopoulou, V. Giampatzis, C. Savopoulos, A. I. Hatzitolios