[1] Hosp Sick Children, Div Plast & Reconstruct Surg, Toronto, ON, Canada
[2] Boston Childrens Hosp, Dept Neurosurg, Boston, MA USA
[3] Univ Massachusetts, Med Sch, Worcester, MA 01605 USA
[4] Connecticut Childrens, Div Plast & Craniofacial Surg, Hartford, CT USA
[5] Boston Childrens Hosp, Dept Anesthesiol Crit Care & Pain Med, Boston, MA USA
[6] Boston Childrens Hosp, Dept Plast & Oral Surg, Boston, MA USA