Radiologic Signs of PneumoperitoneumLee, Ching-Hsing M.D.Author informationChang Gung Memorial Hospital, Taoyuan, Taiwan [email protected]New England Journal of Medicine 362(25):p 2410, June 24, 2010. | DOI: 10.1056/NEJMicm0904627Copyright © 2010 Massachusetts Medical Society. All rights reserved.