Scources:
Niederhofer, H. (2011). "Association of attention-deficit/hyperactivity disorder and celiac disease: a brief report." The Primary Care Companion to CNS Disorders, vol. 13(3).
Niederhofer, H., Pittschieler, K. (November 2006). "A preliminary investigation of ADHD symptoms in persons with celiac disease." Journal of Attention Disorders, vol. 10(2): 200-4.

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