1.
alpha 1-Antitrypsin-levels and phenotypes in Crohn's disease in the Netherlands.
2.
3.
4.
5.
6.
7.
Immunoglobulin allotypes in Crohn's disease in the Netherlands.
Seropositivity in Dutch Crohn's disease patients against primed nude mouse lymph nodes, and the difference with lymphocytotoxic antibodies.