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Average nitric oxide (NO) release measurements from freshly fabricated 8, 14.2, and 19.5 wt% NORel-ETT over 7-day period (n = 3). NO release measured from ETT samples suspended above PBS at 37°C using a Sievers Chemiluminescence Nitric Oxide Analyzer. ETT, endotracheal tube; NORel-ETT, nitric oxide-releasing endotracheal tube; PBS, phosphate-buffered saline
