[1] USC Norris Comprehens Canc Ctr, Los Angeles, CA USA
[2] Univ Cologne, Dept Gen Visceral & Tumor Surg, D-50931 Cologne, Germany
[3] Response Genet Inc, Los Angeles, CA USA
[4] Univ Cologne, Dept Gen Visceral & Canc Surg, D-50931 Cologne, Germany
[5] Univ So Calif, Norris Comprehens Canc Ctr, Los Angeles, CA USA
[6] Univ So Calif, Keck Sch Med, Dept Pathol, Los Angeles, CA 90033 USA