[1] Natl Res Council Canada, Biotechnol Res Inst, Hlth Sector, Mammalian Cells Genet Grp, Montreal, PQ H4P 2R2, Canada
[2] Natl Res Council Canada, Biotechnol Res Inst, Hlth Sector, Genet Grp, Montreal, PQ H4P 2R2, Canada
[3] McGill Univ, Dept Med, Montreal, PQ, Canada
[4] McGill Univ, Dept Biol, Montreal, PQ H3A 1B1, Canada