“…Parents were interviewed for what they mean with the term "constipation, diarrhea, gastro-esophageal reflux and vomiting," the frequency of bowel movements and vomiting, the consistency and size of stools, whether the child experiences abdominal pain, definition of the age at symptom onset, whether symptoms develop abruptly or gradually, family history of allergy or atopic disease, the presence of celiac disease, the presence of chest pain or heartburn, extraesophageal manifestation of airway (Buie, Fuchs, Furuta, Kooros, Levy, & Lewis, 2010;Buie, Fuchs, Furuta, Kooros, Levy, & VandeWater et al, 2010). Moreover, each child underwent a complete psychical examination with a pediatrician (Buie, Fuchs, Furuta, Kooros, Levy, & Lewis, 2010;Buie, Fuchs, Furuta, Kooros, Levy, & VandeWater et al, 2010). Given that the body mass index (BMI) (kg/m 2 ) is one of the objective growth parameters useful for diagnosis and monitoring of failure to thrive or obesity, weight and height were measured, and the BMI was calculated for all participants (Cole, Bellizzi, Flegal, & Dietz, 2000;Cummings, John, Davis, & McTimoney, 2005).…”