Antigenic Stimuli do not Influence Thymic B Lymphocytes: A Morphological and Functional Study inGerm-Free and Conventionally Reared Piglets - B. Cukrowska; I. Trebichavský; P. Rossmann; Z. Řeháková; J. ŠInkora; K. Haverson; R. Lodinová-Žádníková; H. Tlaskalová-Hogenová (Clinical and Developmental Immunology)