Key points are not available for this paper at this time.
An introduction to tools supporting PubMed Author: Xuzeng He ( ORCID: 0009–0005–7317–7426) PubMed is a free Web literature search service developed and maintained by the National Center for Biotechnology Information ( NCBI ), and it is also a part of NCBI’s Entrez retrieval system that provides access to a diverse set of 38 databases.
Xuzeng He (Mon,) studied this question.