Analysis of etiology and diagnostic clues of childhood pleural effusion in 2419 cases 
LI Xiaoyong, LI Yonggang, PAN Zhengxia, WU Chun
临床儿科杂志 . 2014, (12): 1132 .  DOI: 10.3969 j.issn.1000-3606.2014.12.008