[1] Vanderbilt Univ, Med Ctr, Div Hepatobiliary Surg & Liver Transplantat, Dept Surg, Nashville, TN 37232 USA
[2] Vanderbilt Univ, Med Ctr, Div Surg Oncol, Dept Surg, Nashville, TN 37232 USA
[3] Vanderbilt Univ, Med Ctr, Dept Biostat, Dept Surg, Nashville, TN 37232 USA