Endobronchial ultrasound to assess airway wall thickening: validation in vitro and in vivo
T.J. Shaw, S.L. Wakely, C.R. Peebles, R.L. Mehta, J.M. Turner, S.J. Wilson, P.H. Howarth
European Respiratory Journal 2004 23: 813-817; DOI: 10.1183/09031936.04.00119904