Exclusion Criteria:
1-Evidence of digestive disease
2-Any other condition associated with increased intestinal permeability, such as cystic fibrosis,
3- Food allergy or patients having positive skin test against common food allergens.
The control subjects fulfilled the same exclusion criteria as the patients, and never had asthma or eczema.
4- Patient refusal to participate.
The control subjects fulfilled the same exclusion criteria as the patients, and never had asthma or eczema.