title: Unusual pneumoperitoneum secondary to ruptured liver abscess.
authors.affiliation: Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, Republic of China.
authors.forename: Yuan-Pin
authors.initials: YP
authors.lastname: Hsu
authors.forename: Kuo-Feng
authors.initials: KF
authors.lastname: Hsu
authors.forename: Chung-Bao
authors.initials: CB
authors.lastname: Hsieh
authors.forename: Ying-Yu
authors.initials: YY
authors.lastname: Lee
authors.forename: Cheng-Jueng
authors.initials: CJ
authors.lastname: Chen