[1] Duke Univ, Dept Pediat, Sch Med, DUMC 3936, Durham, NC 27710 USA
[2] Univ N Carolina, Sch Social Work, Chapel Hill, NC 27515 USA
[3] Duke Univ, Fuqua Sch Business, Durham, NC 27710 USA
[4] Duke Univ, Duke Clin Res Inst, Sch Med, Durham, NC 27710 USA
[5] Duke Univ, Dept Populat Hlth Sci, Sch Med, Durham, NC 27710 USA
[6] UCSF Child & Adolescent Headache Program, Dept Neurol, San Francisco, CA USA
[7] Univ Penn, Dept Neurol, Perelman Sch Med, Philadelphia, PA 19104 USA
[8] Miles Migraine, Lafayette Hill, PA USA
[9] Alfred I Dupont Hosp Children, Nemours Neurol Headache Program, Delaware, OH USA