Pneumoperitoneum and Pneumoretroperitoneum in Blunt Trauma PatientsNishina, Masayoshi MD; Fujii, Chiiho MD; Ogino, Ryukoh MD; Kobayashi, Ryozo MD; Kohama, Akitsugu MDJournal of Trauma-Injury Infection & Critical Care: September 2000 - Volume 49 - Issue 3 - pp 565-566 Case Reports