[1] Univ Michigan, Sch Dent, Dept Orthodont & Pediat Dent, Ann Arbor, MI 48109 USA
[2] Univ Michigan, Sch Med, Ann Arbor, MI USA
[3] Univ Michigan, Ctr Human Growth & Dev, Ann Arbor, MI 48109 USA
[4] Jacksonville Univ, Sch Orthodont, Jacksonville, FL USA
[5] Univ Florence, Dept Orthodont, Florence, Italy