NO in exhaled air is correlated with markers of eosinophilic airway inflammation in corticosteroid-dependent childhood asthma
J Mattes, K Storm van's Gravesande, U Reining, K Alving, G Ihorst, M Henschen, J Kuehr
European Respiratory Journal 1999 13: 1391-1395; DOI: 10.1034/j.1399-3003.1999.13f26.x