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nih.gov
ncbi.nlm.nih.gov
DeBakey ME (1991). “The National Library of Medicine. Evolution of a premier information center”. 《JAMA》 266 (9): 1252–8. doi:10.1001/jama.266.9.1252. PMID1870251.
“PubMed”. United States National Library of Medicine. 2013년 5월 28일에 확인함.