Airway Before Severe Injury (IMAGE) Duke University Medical Center Caption This section of a normal chimeric airway shows a patch distribution of mixed green fluorescent protein positive (green) and negative cells. Credit Cancer Research UK Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.