[1] Univ Tennessee, Hlth Sci Ctr, Dept Pediat, Memphis, TN 38103 USA
[2] Le Bonheur Childrens Hosp, Memphis, TN USA
[3] Childrens Fdn Res Inst, Memphis, TN USA
[4] Alnylam Pharmaceut, Cambridge, MA USA
[5] Univ Southampton, Fac Med, Clin & Expt Sci, Southampton SO9 5NH, Hants, England
[6] Univ Rochester, Sch Med & Dent, New York, NY USA
[7] Rochester Gen Hosp, New York, NY USA
[8] Univ Tennessee, Ctr Hlth Sci, Dept Mol Sci, Memphis, TN 38103 USA