TY - JOUR A1 - Falagas, M.E. A1 - Vardakas, K.Z. A1 - Mourtzoukou, E.G. T1 - Sex differences in the incidence and severity of respiratory tract infections Y1 - 2008 DO - 10.1016/j.rmed.2007.12.009 JF - Respiratory Medicine VL - 102 IS - 4 ER -