3Leung CC, Yew WW, Chang KC, et al. Risk of active tuberculosis among schoolchildren in Hong Kong [J].Arch Pediatr Adolesc Med,2006,160(3) :247 -251.
4Lin YS, Huang YC, Chang LY, et al. Clinical characteristics of tu- berculosis in children in the north of Taiwan [J]. J Microbiol Immu- nol Infect,2005,38 ( 1 ) :41 - 46.