1. Brandtzaeg P, Nilssen DE, Rognum TO, Thrane PS. Ontogeny of the mucosal immune system and IgA deficiency. Gastroenterol Clin North Am 1991;20:397-439.
2. Brandtzaeg P, Halstensen TS, Kett K, Krajci P, Kvale D, Rognum TO, Scott H, Sollid LM. Immunobiology and immunopathology of human gut mucosa: humoral immunity and intraepithelial lymphocytes. Gastroenterology 1989;97:1562-1584.
3. van der Heijden PJ, Stok W, Bianchi AT. Contribution of immunoglobulin-secreting cells in the murine small intestine to the total 'background' immunoglobulin production. Immunology 1987;62:551-555.
4. Schreiber S, Raedler A, Stenson WF, MacDermott RP. The role of the mucosal immune system in inflammatory bowel disease. Gastroenterol Clin North Am 1992;21:451-502.
5. Hansen BU, Ericsson UB, Henricsson V, Larsson A, Manthorpe R, Warfvinge G. Autoimmune thyroiditis and primary Sjögren's syndrome: clinical and laboratory evidence of the coexistence of the two diseases. Clin Exp Rheumatol 1991;9:137-141.