Clinical presentation of influenza a (H1N1) infection in a local emergency department in Greece by Ioannis Andrianopoulos, Fotini Rozi, Panagiota Mylona, Theodoros Mpoumpoukas, Vassiliki Leventogianni, Efthimia Stofa, Apostolos Pappas, Panoutsopoulos Athanasios, Voudoukis Evangelos, Georgios Andrianopoulos