CYGB and pneumonia: while there were no significant difference in the frequency and numerical value of other clinical features (gender, cough, wheezing, pharyngeal hyperaemia, rales, T≧38.5°C, severe pneumonia, WBC, HGB, AST, ALT, LDH, C-reactive protein, procalcitonin, neutrophilic granulocyte percentage and hospitalization duration) between the two group.