1Interpretation of the norms for the diagnosis and treatment of children's community-acquired pneumonia 2019LIU Jin-rong, ZHAO Cheng-song, ZHAO Shun-yingGUIDELINES UNDERSTANDING185-1872Attach importance to the standard diagnosis and treatment and clinical research of pneumonia due to adenovirus in childrenLIU En-mei, FU ZhouEDITORIAL188-1903Reflections on some problems of individual precise treatment for asthma in childrenKANG Xiao-hui, CAO LingSafe and rational use of drugs in respiratory system disease191-1954Methodological recommendation for clinical comprehensive evaluation of pediatric respiratory drugsWANG Xiao-lingSafe and rational use of drugs in respiratory system disease195-1985Advances in the treatment of rare diseases involving the respiratory system in childrenWANG Hao, XU Bao-pingSafe and rational use of drugs in respiratory system disease198-2026Rational administration of medicine for recurrent respiratory tract infections in childrenCHEN Li-na, LIU Han-minSafe and rational use of drugs in respiratory system disease202-2067Problems and norms of drug treatment of common cold in childrenCHENG Qi, SHANG Yun-xiaoSafe and rational use of drugs in respiratory system disease206-2098Drug therapy for chronic cough in childrenXU Xiu-juan, LUO Zheng-xiuSafe and rational use of drugs in respiratory system disease209-2129Clinical multicenter study of budesonide inhalation in the treatment of bronchiolitisWANG Tian-yue, SHANG Yun-xiao, FAN Ying-hongORIGINAL CONTRIBUTION213-216,22110Comparison of the diagnostic values of two criteria for the diagnosis of hypertrophic cardiomyopathy in childrenSHAN Guang-song, WANG Ben-zhen, GUO En-yuORIGINAL CONTRIBUTION217-22111Correlation between levels of fractional exhaled nitric oxide and peripheral blood IL-9、 IL-17 in children with bronchial asthmaMA Yu, DAI Yin-fang, ZHANG Xin-xingORIGINAL CONTRIBUTION222-22712Analysis of clinical data of 158 patients with methylmalonic acidemia in Children's Hospital Affiliated to Zhengzhou UniversityWU Sheng-nan, CHEN Qiong, CHEN Yong-xingORIGINAL CONTRIBUTION228-23213Study on distribution of children's laryngopharyngeal reflux in respiratory diseasesZENG Hui-qin, HU Zhi-fan, WU Jin-zhunORIGINAL CONTRIBUTION233-236 