毛细支气管炎的年龄上限:12个月还是6个月?%D 2012 %R 10.1183/09031936.00170511 %J欧洲呼吸杂志%P 787-788 %V 39% N 3% U //www.qdcxjkg.com/content/erj/39/3/787.full.pdf