An observational study of headaches in children and adolescents with functional abdominal pain: Relationship to mucosal inflammation and gastrointestinal and somatic symptoms.
Friesen C, Singh M, Singh V, Schurman JV. An observational study of headaches in children and adolescents with functional abdominal pain: Relationship to mucosal inflammation and gastrointestinal and somatic symptoms. Medicine (Baltimore). 2018 Jul; 97(30):e11395.