Ajitsaria R, Awad W I, Jaffe A, Sheppard M N, Goldstraw P, Hansell D, Bush A
Dept of Paediatric Respiratory Medicine, Royal Brompton & NHS Trust, Sydney Street, London, SW3 6NP, UK.
Eur Respir J. 2004 Feb;23(2):347-51. doi: 10.1183/09031936.03.00035203.