TY - JOUR T1 - Spontaneous pneumomediastinum JF - Canadian Medical Association Journal JO - CMAJ SP - E276 LP - E276 DO - 10.1503/cmaj.081661 VL - 181 IS - 12 AU - Emmet E. McGrath AU - Zoe Blades AU - Chris Barber Y1 - 2009/12/08 UR - http://www.cmaj.ca/content/181/12/E276.abstract ER -