RT Journal Article SR Electronic T1 Image Case JF Breathe JO Breathe FD European Respiratory Society SP 65 OP 67 DO 10.1183/18106838.0101.65 VO 1 IS 1 A1 M. Martins A1 C. Perrot A1 N. Howarth YR 2004 UL http://breathe.ersjournals.com/content/1/1/65.abstract AB