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Levels of soluble receptor for advanced glycation end-products (sRAGE) (A), angiopoietin-2 (Ang-2) (B), and surfactant protein-D (SP-D) (C) on each day by acute respiratory distress syndrome (ARDS) diagnosis. Each panel shows the absolute levels and distribution of the three biomarkers on each day of collection. Number of patients for each day was as follows: 111 on day 1 (21 ARDS vs 90 non-ARDS), 100 on day 2 (18 ARDS vs 82 non-ARDS), and 83 on day 3 (16 ARDS vs 67 non-ARDS).
