Exhaled and nasal NO levels in allergic rhinitis: relation to sensitization, pollen season and bronchial hyperresponsiveness
AH Henriksen, M Sue-Chu, T Lingaas Holmen, A Langhammer, L Bjermer
European Respiratory Journal 1999 13: 301-306; DOI: 10.1034/j.1399-3003.1999.13b14.x