Correspondence: Dianbo Cao, MD, PhD, Department of Radiology, The First Hospital of Jilin University, XinMinZhu St 71, Changchun, Jilin Province, 130021 China (email@example.com).
Accepted for Publication: March 26, 2012.
Published Online: June 26, 2013. 10.1001/jamasurg.2013.310a 10.1001/jamasurg.2013.310b
Author Contributions:Study concept and design: Cao. Acquisition of data: Tai. Analysis and interpretation of data: All authors. Drafting of the manuscript: Tai and Cao. Critical revision of the manuscript for important intellectual content: Sun and Cao. Administrative, technical, and material support: Cao.
Conflict of Interest Disclosures: None reported.