•             Skip to main page content      
            
    Access keysNCBI HomepageMyNCBI HomepageMain ContentMain Navigation
              
        
    Home Page
        
      
            
          PubMed® comprises more than 30 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full-text content from PubMed Central and publisher web sites.    
      
        
          
          
          
    Learn
                            About PubMed                                FAQs & User Guide                                Finding Full Text                  
          
          
          
    Find
                            Advanced Search                                Clinical Queries                                Single Citation Matcher                  
          
          
          
    Download
                            E-utilities API                                FTP                                Batch Citation Matcher                  
          
          
          
    Explore
                            MeSH Database                                Journals                                Legacy PubMed (available until at least 9/30/2020)                  
      
        
      
        
          
            
              Trending Articles        
            
              PubMed records with recent increases in activity        
                  
                  
                          See more trending articles                  
              
        
          
            Latest Literature      
          
            New articles from highly accessed journals      
              
      
      
                         
      Feedback
            
                                                
        2. 
http://www.nhde20.cn |

http://m.nhde20.cn |

http://wap.nhde20.cn |

http://3g.nhde20.cn |

http://4g.nhde20.cn |

http://5g.nhde20.cn |

http://mobile.nhde20.cn |

http://vip.nhde20.cn |

http://ios.nhde20.cn |

http://anzhuo.nhde20.cn |

http://7ca.nhde20.cn |

http://ce8b80.nhde20.cn |

http://38e.nhde20.cn |

http://45793.nhde20.cn/3421d2.html |

http://45793.nhde20.cn/441.html |

http://45793.nhde20.cn/1.html |

91频道在线精品