MUC1 and acute respiratory distress syndrome: Terpstra and Dr. Aman conducted a systematic review and meta-analysis of all studies on plasma biomarkers associated with either diagnosis of ARDS in the at-risk population or ARDS-related mortality.They showed that increased plasma levels of KL-6, LDH, sRAGE, and vWF are most strongly associated with ARDS diagnosis in the at-risk population, whereas the strongest association with ARDS mortality was found for IL-4, IL-2, Ang-2, and KL-6 [21].