Archival “normal” (no lung pathology and non-ARDS), “early” (within 48 hours), and “later” (after day 7) ARDS lung-tissue sections (n = 5) were immunostained for VEGFR1, VEGFR2, and NRP-1 from human subjects (n = 4). The gene discussed is KDR; the disease is acute respiratory distress syndrome.