美国政府关门对在NCBI查文献都有影响了，哈哈！

Because of a lapse in government funding, the information on this website may not be up to date, transactions submitted via the website may not be processed, and the agency may not be ableto respond to inquiries until appropriations are enacted.

The NIH Clinical Center (the researchhospital of NIH) is open. For more details about its operating status, please visit cc.nih.gov.

Updates regarding government operating status and resumption of normal operations can be found at USA.gov.