Diagnostic , therapeutic and economic consequences of a positive urinary antigen test for Legionella spp . in patients admitted with community-acquired pneumonia : a 7 - year retrospective evaluation .8 .刘又宁,陈民钧,赵铁梅,等.中国城市成人社区获得性肺炎665例病原学多中心调查.中华结核和呼吸杂志, ......