[1] Samuel Lunenfeld Res Inst, Ctr Syst Biol, Toronto, ON M5G 1X5, Canada
[2] Univ Michigan, Dept Pathol, Ann Arbor, MI 48109 USA
[3] Univ Toronto, Dept Mol Genet, Toronto, ON M5S 1A8, Canada
[4] Univ Edinburgh, Sch Biol Sci, Edinburgh EH9 3JR, Midlothian, Scotland
[5] Univ Edinburgh, Wellcome Trust Ctr Cell Biol, Edinburgh EH9 3JR, Midlothian, Scotland
[6] Univ Michigan, Dept Biostat, Ann Arbor, MI 48109 USA
[7] Univ Michigan, Ctr Computat Med & Bioinformat, Ann Arbor, MI 48109 USA