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Roiha, H L; Kuehni, C E; Zanolari, M; Zwahlen, M; Baldwin, D N; Casaulta, C; Nelle, M; Frey, U (2007). Alterations of exhaled nitric oxide in pre-term infants with chronic lung disease. European respiratory journal, 29(2), pp. 251-8. Sheffield, UK: European Respiratory Society 10.1183/09031936.00016106
