[1] Univ British Columbia, Dept Biochem & Mol Biol, Vancouver, BC, Canada
[2] Univ British Columbia, Michael Smith Labs, Vancouver, BC, Canada
[3] Univ British Columbia, Ctr Blood Res, Vancouver, BC, Canada
[4] Univ British Columbia, Dept Oral Biol & Med Sci, Vancouver, BC, Canada
[5] Univ British Columbia, Dept Psychiat, Vancouver, BC, Canada
[6] Univ British Columbia, Dept Stat, Vancouver, BC, Canada