Exhaled nitric oxide levels in non-allergic and allergic mono- or polysensitised children with asthma
M Silvestri, F Sabatini, D Spallarossa, L Fregonese, E Battistini, M G Biraghi, G A Rossi
Thorax Nov 2001, 56 (11) 857-862; DOI: 10.1136/thorax.56.11.857