[1] Univ North Carolina Chapel Hill, Dept Surg, Div Surg Oncol & Endocrine Surg, Chapel Hill, NC USA
[2] Univ Calif, UCLA Med Ctr, Dept Emergency Med, David Geffen Sch Med, Torrance, CA USA
[3] Turku Univ Hosp, Div Digest Surg & Urol, Turku, Finland
[4] Univ Turku, Dept Surg, Turku, Finland
[5] JAMA Surg, Chicago, IL USA