[1] UNIV PITTSBURGH, INST CANC, DIV BASIC RES, PITTSBURGH, PA 15213 USA
[2] UNIV PITTSBURGH, SCH MED, DEPT MOLEC GENET & BIOCHEM, PITTSBURGH, PA 15213 USA
[3] UNIV PITTSBURGH, SCH MED, DEPT PATHOL, PITTSBURGH, PA 15213 USA
[4] UNIV PITTSBURGH, SCH MED, DEPT SURG, PITTSBURGH, PA 15213 USA
[5] NCI, BETHESDA, MD 20892 USA