Differences in respiratory system compliance between different lung injury groupings. TOX, toxicity; H-IM, hyperimmune response; HEP, hepatic failure; PERF, perfusion-related; TRALI, transfusion-associated acute lung injury; PAN, pancreatitis; INH, inhalation injury; NEU, neurologic injury; DOD, drug overdose; IDIO, idiopathic; CRS, respiratory system compliance.