[1] Univ N Carolina, Lineberger Comprehens Canc Ctr, Dept Genet, Chapel Hill, NC 27599 USA
[2] Univ N Carolina, Lineberger Comprehens Canc Ctr, Dept Pathol & Lab Med, Chapel Hill, NC 27599 USA
[3] Univ N Carolina, Div Hematol Oncol, Chapel Hill, NC 27599 USA
[4] Univ Utah, Huntsman Canc Inst, Dept Pathol, Salt Lake City, UT 84112 USA