[1] Univ North Carolina Chapel Hill, Integrat Program Biol & Genome Sci, Chapel Hill, NC 27599 USA
[2] Univ North Carolina Chapel Hill, Dept Genet, Chapel Hill, NC 27599 USA
[3] Univ North Carolina Chapel Hill, Dept Biol, Chapel Hill, NC 27599 USA
[4] Univ North Carolina Chapel Hill, Curriculum Genet & Mol Biol, Chapel Hill, NC 27599 USA
[5] Univ North Carolina Chapel Hill, Dept Biochem & Biophys, Chapel Hill, NC 27599 USA
[6] Univ North Carolina Chapel Hill, Lineberger Comprehens Canc Ctr, Chapel Hill, NC 27599 USA