No abstract available
MeSH terms
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Animals
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Animals, Newborn
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Fluorescent Antibody Technique
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Germ-Free Life*
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Histocytochemistry
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Immunoelectrophoresis
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Immunoglobulin G / analysis
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Immunoglobulin M / analysis
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Intestinal Mucosa / immunology
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Intestines / immunology
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Lymph Nodes / immunology
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Lymphoid Tissue / immunology*
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Mice
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Spleen / immunology*
Substances
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Immunoglobulin G
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Immunoglobulin M