Evaluation of sampling by tracheal aspiration and nasopharyngeal swabs in the identification of bacterial etiology of acute lower respiratory tract infection in children
CHEN Rong, ZHAO Gen-Ming, LIN Yu-Zun, HAO Chuang-Li, DING Yun-Fang
中国当代儿科杂志 . 2010, (05): 393 -395 .