Qin?Z, Lee ? B,Yang ? L,et ? al . ? Antimicrobial ? activities ? of ? YycG ? histidine ? kinase ? inhibitors ? against ? Staphylococcus ? epidermidis ? biofilms . ? FEMS ? Microbiol ? Lett,2007,273:149-156 .Yasuda?H, Koga ? T,Fukuoka ? T . ? In ? vitro ? ......