[1] Univ Pittsburgh, Grad Sch Publ Hlth, Dept Human Genet, Pittsburgh, PA 15219 USA
[2] Univ Pittsburgh, Sch Dent Med, Ctr Craniofacial & Dent Genet, Dept Oral Biol, Pittsburgh, PA 15219 USA
[3] Univ Pittsburgh, Grad Sch Publ Hlth, Dept Biostat, Pittsburgh, PA 15219 USA
[4] Univ Washington, Dept Biostat, Seattle, WA 98195 USA
[5] Johns Hopkins Univ, Sch Med, Ctr Inherited Dis Res, Baltimore, MD USA
[6] Statens Serum Inst, Dept Epidemiol Res, DK-2300 Copenhagen, Denmark
[7] Univ Iowa, Dept Pediat, Iowa City, IA 52242 USA
[8] Univ Pittsburgh, Sch Dent Med, Dept Dent Publ Hlth & Informat Management, Pittsburgh, PA 15219 USA
[9] W Virginia Univ, Sch Dent, Dept Periodont, Morgantown, WV 26506 USA
[10] Univ Iowa, Coll Dent, Dept Prevent & Community Dent, Iowa City, IA 52242 USA
[11] Univ Iowa, Coll Publ Hlth, Dept Epidemiol, Iowa City, IA USA
[12] Univ Iowa, Coll Dent, Dept Pediat Dent, Iowa City, IA 52242 USA
[13] Washington Univ, Sch Med, Dept Pediat, Div Genet & Genom Med, St Louis, MO 63110 USA