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PubMed是由美国国立医学图书馆（U.S. National Library of Medicine）国家生物技术信息中心开发研制的基于Web的网上医学文献检索系统。 该系统å…@PubMed® comprises more than 40 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full text content ^PubMed comprises more than 28 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full-text content fr^Welcome to NCBI The National Center for Biotechnology Information advances science and health by providing access to biomedical and genomic information. About the NCBI | Mission | #Nov 2, 2023 · 世界权威的生物医学目录数据库，全球免费使用，部分可获得全文。访问入口网址：https://pubmed.ncbi.nlm.nih.gov/?PubMed高级搜索功能，支持多字段组合检索、布尔逻辑运算、日期范围限定等精确搜索。-而PubMed是互联网上使用最广泛的免费MEDLINE检索工具，是美国国家医学图书馆 (NLM)所属的国家生物技术信息中心 (NCBI)于2000å¹´4月开发的一ä¸