[1] Washington Univ, St Louis Sch Med, Pain Ctr, St Louis, MO 63110 USA
[2] Washington Univ, St Louis Sch Med, Dept Anesthesiol, Div Clin & Translat Res, St Louis, MO 63110 USA
[3] Seattle Childrens Res Inst, Ctr Child Hlth Behav & Dev, Seattle, WA USA
[4] Univ British Columbia, Dept Pediat, Vancouver, BC, Canada
[5] BC Childrens Hosp, Res Inst, Vancouver, BC, Canada
[6] Washington Univ St Louis, Dept Pediat, Div Endocrinol & Diabet, St Louis, MO USA
[7] Washington Univ, St Louis Childrens Hosp, Sch Med, Transgender Ctr, St Louis, MO USA
[8] Univ Washington, Sch Med, Dept Anesthesiol & Pain Med, Seattle, WA USA
[9] Univ Bath, Dept Psychol, Bath, England
[10] Univ Bath, Ctr Pain Res, Bath, England