[1] Univ Calgary, Med Ctr, Cell Regulat Grp, Calgary, AB T2N 4N1, Canada
[2] Univ Calgary, Med Ctr, Cell Regulat Grp, Calgary, AB T2N 4N1, Canada
[3] Univ Calgary, Med Ctr, Canc Biol Res Grp, Dept Biochem Med, Calgary, AB T2N 4N1, Canada
[4] Hong Kong Univ Sci & Technol, Dept Biochem, Kowloon, Peoples R China