Pneumoretroperitoneum, Pneumomediastinum, Pneumothorax, and Subcutaneous Emphysema after Diagnostic Colonoscopy - Lee, H S; Park, H H; Kim, J S (The Korean journal of gastroenterology = Taehan Sohwagi Hakhoe chi, 2017)
. doi:10.4166/kjg.2017.70.3.145