RT Journal Article SR Electronic T1 Happy birthday Breathe JF Breathe JO Breathe FD European Respiratory Society SP 7 OP 8 DO 10.1183/18106838.0201.7 VO 2 IS 1 A1 K-H. Carlsen YR 2005 UL http://breathe.ersjournals.com/content/2/1/7.abstract AB