1New requirements for hepatitis B virus nucleic acid testing in current clinical practice of chronic hepatitis B treatmentYANG Rui-feng, CHEN Hong-song, LU Feng-min1-72Challenges and solution strategies for diagnosis of microbial pathogens of respiratory tract infectionsHU Yan-ning, LU Bing-huai8-123Non-tuberculous mycobacterial pulmonary disease requires more attentionQIN Zhi-qiang, MA Gang13-184Application of metagenome technology in infectious diseasesSUN Bo, ZHENG Guang-hui, GAO Yang19-225Advances in laboratory products and techniques for detection of Mycobacterium tuberculosisPANG Yu, WANG Yu-feng, GAO Xing-hui23-346Comparison of semen qualities in patients with different types of infertility and their effects on clinical out-comes of rescue intracytoplasmic sperm injectionCHEN Qi-gui, LI Da-wen, CHENG Jun-ping35-407Observation on the clinical effect of static-progressive stretch splinting on stiff elbow patients after trauma surgeryFAN Shuai, CAI Bin41-448The expressions of VEGF in lymph nodes and bone marrow of mice with oral cancer at different stages and the influences of their microenvironments on lymphatic metastasisLU Ying, CHENG Li, YAN Qi-zhang45-509Effect of μ-opioid receptor gene polymorphism on pain sensitivity in patients undergoing lumbar spine surgeryYANG Hui-hong, LA Hong-ling, CHEN Nan51-5610The application value of lung ultrasound in the examination of neonatal atelectasisFENG Zai-li, YIN Zhao-qing, DUAN Zheng-fan56-5911Clinical application value of fetal heart ultrasound intelligent navigation technique in detecting fetal heart congenital malformationsHU Li-rong, MA Xiao-juan, FENG Meng-juan60-6412A comparative study on the clinical efficacy of Zessys foraminoplasty and traditional foraminoplasty in treat-ment of distant prolapsed lumbar intervertebral disc herniationWANG Song-mao, XU Yong-hui, HU Jun-hua65-6913Study on the correlation between extraction treatment and the changes in dental arch form, buccal corridor and facial profile in patients with skeletal class Ⅱ malocclusionTU Zi-duan, ZHOU Yan, FANG Zhi-xin69-7414Analysis of chromosomal karyotypes and pregnancy outcomes of 72 fetuses with nuchal translucency thicken-ing in the first trimesterLAI Yu-qing, DENG Guo-sheng75-7815Analysis of different subtypes of behavior problem and social living ability in children with attention deficit hyperactivity disorderLIAN Qiong-xia, WANG Zhen-zhen, ZHANG Juan78-8216The predictive value of serum aldosterone level for postoperative recurrence of persistent atrial fibrillation after first catheter ablationYANG Wen-wu, NING Bin83-8717Research progress of Gitelman syndromeZHAI Zhen-wei, LU Wen-sheng96-10018Research progress of coagulopathy during perioperative period of cardiopulmonary bypassYIN Shi-jie, HUANG Hai-qing101-10419Research progress in diagnosis and treatment of eosinophilic granuloma of the cervical spine in adultsZHANG Yu, YU Cheng-qiang, WU You-cai104-11020Research progress in the clinical characteristics and organ damage of SARS, MERS and COVID-19LUO Ya-li, WANG Bi-wen, AN Fang-yu110-114,封3 