[1] Mem Sloan Kettering Canc Ctr, Dept Surg, Hepatopancreatobiliary Serv, New York, NY 10065 USA
[2] Obafemi Awolowo Univ, Dept Surg, Coll Hlth Sci, Ife, Nigeria
[3] Korle Bu Teaching Hosp, Natl Ctr Radiotherapy & Nucl Med, Accra, Ghana
[4] Fred Hutchinson Canc Res Ctr, Seattle, WA 98104 USA
[5] Univ Washington, Seattle, WA 98195 USA
[6] Komfo Anokye Teaching Hosp, Dept Surg, Sch Med Sci, Kumasi, Ghana
[7] Univ Sierra Leone, Connaught Hosp, Dept Surg, Freetown, Sierra Leone
[8] Univ Chicago, Ctr Clin Canc Genet & Global Hlth, Dept Med, Pritzker Sch Med, Chicago, IL 60637 USA
[9] Univ Lagos, Coll Med, Dept Radiotherapy, Lagos, Nigeria
[10] Univ Lagos, Coll Med, Dept Anat & Mol Pathol, Lagos, Nigeria
[11] Univ Cape Town, Dept Obstet & Gynaecol, Inst Infect Dis & Mol Med, ZA-7925 Cape Town, South Africa