Affiliation: | 1. Child & Adolescent Headache Program, University of California San Francisco, San Francisco, California, USA;2. Department of Epidemiology & Biostatistics, University of California San Francisco, San Francisco, California, USA;3. Minneapolis Clinic of Neurology, Minneapolis, Minnesota, USA;4. Department of Pediatrics, Oregon Health Sciences University, Portland, Oregon, USA;5. Department of Neurology, University of California San Francisco, San Francisco, California, USA;6. Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA Division of Behavioral Medicine and Clinical Psychology, Cincinnati Children's Hospital, Cincinnati, Ohio, USA Headache Center, Cincinnati Children's Hospital, Cincinnati, Ohio, USA;7. Pediatric Headache Program, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA Department of Neurology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA |