Functional gastrointestinal symptoms in children with anxiety disorders
Journal of Abnormal Child Psychology (2013) - Comment
pubmed: 22773359  doi: 10.1007/s10802-012-9657-0  issn: 1573-2835  issn: 0091-0627 

Allison M. Waters, Elizabeth Schilpzand, Clare Bell, Lynn S. Walker, Kari Baber