这个词是什么意思？
Heterogeneous group of immunodeficiency syndromes characterized by hypogammaglobulinemia of most isotypes, variable B-cell defects, and the presence of recurrent bacterial infections.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D017074 · MeSH 2026。
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