RESULTS	Meanwhile , a significant shortening of duration of using antibiotics was also found [ ( 13.4 + / -10.0 ) days vs. ( 19.7 + / -13.5 ) days , P = 0.004 ] , with a lowering of incidence of occurrence of new infection ( 37.6 % vs. 53.4 % , P = 0.014 ) .\