[1] Univ Toledo, Univ Pittsburgh, Toledo, OH USA
[2] Univ Pittsburgh, Pittsburgh, PA USA
[3] Univ Florida, Dept Surg, Gainesville, FL USA
[4] Univ Pittsburgh, Med Ctr, Dept Surg Oncol, Pittsburgh, PA USA
[5] Univ Pittsburgh, Dept Surg, Pittsburgh, PA USA
[6] Univ Pittsburgh, Med Ctr, Pittsburgh, PA USA
[7] Univ Pittsburgh, Med Ctr, Div Surg Oncol, Pittsburgh, PA USA