TY - JOUR T1 - Postpartum pneumomediastinum (Hamman's syndrome) JF - Canadian Medical Association Journal JO - CMAJ SP - 32 LP - 32 DO - 10.1503/cmaj.061581 VL - 177 IS - 1 AU - Sabine Majer MD AU - Peter Graber MD Y1 - 2007/07/03 UR - http://www.cmaj.ca/content/177/1/32.abstract ER -