[1] Univ Washington, Genome Ctr, Dept Med, Seattle, WA 98195 USA
[2] Univ Washington, Genome Ctr, Dept Genome Sci, Seattle, WA 98195 USA
[3] Univ Calif San Diego, Dept Med, Glycobiol Res & Training Ctr, La Jolla, CA 92093 USA
[4] Univ Calif San Diego, Dept Cellular & Mol Med, La Jolla, CA 92093 USA