Department of Microbiology and Biotechnology;
University of Ulm;
89068 Ulm;
Germany Immunology Group;
Nutrition and Health Dept.;
Nestlé Research Center;
PO Box 44;
CH-1026 Lausanne;
Switzerland;
Immunology Group;
Nutrition and Health Dept.;
Nestlé Research Center;
PO Box 44;
CH-1026 Lausanne;
Switzerland;
Department of Microbiology and Biotechnology;
University of Ulm;
89068 Ulm;
Germany;