RT Journal Article SR Electronic T1 Pneumomediastinum and pneumorrhachis: a lot of air about nothing? JF Breathe JO breathe FD European Respiratory Society SP 331 OP 334 DO 10.1183/20734735.010311 VO 8 IS 4 A1 Avinash Aujayeb A1 Simon Doe A1 Sylvia Worthy YR 2012 UL http://breathe.ersjournals.com/content/8/4/331.abstract AB