[1] Univ Glasgow, Canc Res UK Beatson Labs, Canc Res UK Dept Med Oncol, Glasgow G61 1BD, Lanark, Scotland
[2] Univ Groningen, Fac Med Sci, Dept Med Genet, NL-9713 AW Groningen, Netherlands
[3] Univ Glasgow, Western Infirm, Dept Pathol, Div Canc Sci & Mol Pathol, Glasgow G11 6NT, Lanark, Scotland
[4] Stanford Univ, Med Ctr, Dept Pathol, Stanford, CA 94305 USA