[1] Boston Childrens Hosp, Dept Psychiat & Behav Sci, Biobehav Pediat Pain Lab, Boston, MA 02118 USA
[2] Boston Childrens Hosp, Pain & Affect Neurosci Ctr, Dept Anesthesiol Crit Care & Pain Med, Boston, MA 02118 USA
[3] Univ Oxford, Nuffield Dept Womens & Reprod Hlth, Med Sci Div, Oxford, England
[4] Boston Childrens Hosp, Div Adolescent Young Adult Med, Boston, MA USA
[5] Harvard Med Sch, Boston, MA USA
[6] Harvard Med Sch, Dept Psychiat, Boston, MA 02115 USA