The relation between the psychological functioning of children with Down syndrome and their urine peptide levels and levels of serum antibodies to food proteins
Nygaard, E., Reichelt, K. L., & Fagan, J. F. (2001). The relation between the psychological functioning of children with Down syndrome and their urine peptide levels and levels of serum antibodies to food proteins. Down's syndrome: research and practice, 6(3), 139-145. doi:10.3104/reports.107