1Fifty years of acute respiratory distress syndrome:reflections and progressPAN Chun, XU Jing-yuan, QIU Hai-boSPECIAL COLOMN441-4432Diagnostic criteria for acute respiratory distress syndrome:need an update?DU BinSYMPOSIUM·CONTROVERSY OF ACUTE RESPIRATORY DISTRESS SYNDROME444-4473Stratification of the severity of acute respiratory distress syndromeLIU Yi-na, MA Xiao-chunSYMPOSIUM·CONTROVERSY OF ACUTE RESPIRATORY DISTRESS SYNDROME448-452,4574Acute respiratory distress syndrome phenotyping:current status and evaluationsWU Wei, ZHONG MingSYMPOSIUM·CONTROVERSY OF ACUTE RESPIRATORY DISTRESS SYNDROME453-4575Lung protective ventilation in acute respiratory distress syndromeCAI Jun-ting, ZHANG Li-naSYMPOSIUM·CONTROVERSY OF ACUTE RESPIRATORY DISTRESS SYNDROME458-4626Correct understanding of spontaneous breathing in patients with acute respiratory distress syndromeYIN Chengfen, XU LeiSYMPOSIUM·CONTROVERSY OF ACUTE RESPIRATORY DISTRESS SYNDROME463-466,4717Objective of oxygenation in patients with acute respiratory distress syndromeZHU Wen-liang, QIN Bing-yuSYMPOSIUM·CONTROVERSY OF ACUTE RESPIRATORY DISTRESS SYNDROME467-4718Application of glucocorticoid in acute respiratory distress syndromeQIAN Chu-yun, XI Yin, LI Yi-minSYMPOSIUM·CONTROVERSY OF ACUTE RESPIRATORY DISTRESS SYNDROME472-475,4849Role of extracorporeal membrane oxygenation in the treatment of acute respiratory distress syndrome:a rescue therapy?WU Yong-ran, YANG Xiao-bo, SHANG YouSYMPOSIUM·CONTROVERSY OF ACUTE RESPIRATORY DISTRESS SYNDROME476-48010Role of big data technology in acute respiratory distress syndromeQIN Ai-hua, HU BoSYMPOSIUM·CONTROVERSY OF ACUTE RESPIRATORY DISTRESS SYNDROME481-48411Value of acute kidney injury staging criteria in predicting renal prognosis of patients with lupus nephritis and acute kidney injuryWANG Ying, CHEN Liang-liang, HUANG Xiao-han, WANG Hui-jing, LE Jing-yun, LAN Lan, CHEN Jiang-hua, HAN FeiORIGINAL CONTRIBUTION485-490,51712Analysis of the features of benign pulmonary nodules highly suspected of lung cancerWANG Ting, HUANG Jing, CHEN Ya-juan, CHEN Tao, YANG Li, GUO Shu-liangORIGINAL CONTRIBUTION491-49413A retrospective cohort study of the effect of serum baseline low-density lipoprotein cholesterol level on the prognosis of maintenance hemodialysis patientsKUAI Ting-ting, WANG Zhi-hong, JIN Rui, XIAO Jia, DONG Cui, YOU Lian-lian, LIU Shu-xinORIGINAL CONTRIBUTION495-49914Effects of low-protein and low-calorie nutritional support with glutamine supplementation in acute phase on critically ill patients with high nutritional riskLI Yan-qin, XIONG Wei-chuan, LIU Su-yun, WAN Jian-guoORIGINAL CONTRIBUTION500-50415Clinical characteristics and prognosis analysis of anti-glomerular basement membrane disease starting with feverZHU Xiao-li, WANG Yang, JIANG Jing, LI Zhe, XU Shu-tian, LI Shi-junORIGINAL CONTRIBUTION505-508 