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4. US extends security clearance for scholars. Brumfiel G Nature; 2005 Feb; 433(7027):672. PubMed ID: 15716914 [No Abstract] [Full Text] [Related]
5. The many facets of homeland security. Laxminarayan S; Kun L IEEE Eng Med Biol Mag; 2004; 23(1):19-29. PubMed ID: 15154257 [No Abstract] [Full Text] [Related]
6. In praise of immigration. Nature; 2004 Jan; 427(6971):181. PubMed ID: 14724594 [No Abstract] [Full Text] [Related]
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8. Special programs for foreign patients and their security concerns. Michelmore S J Healthc Prot Manage; 2003; 19(1):113-6. PubMed ID: 12629795 [TBL] [Abstract][Full Text] [Related]
10. Researchers rage at tightened restrictions on US immigration. Brumfiel G Nature; 2003 Apr; 422(6931):457-8. PubMed ID: 12673212 [No Abstract] [Full Text] [Related]
11. Visa clampdown hits home at US universities. Powell K Nature; 2002 Nov; 420(6914):349. PubMed ID: 12459747 [No Abstract] [Full Text] [Related]
12. As one door closes.. Nature; 2004 Jan; 427(6971):190-5. PubMed ID: 14724608 [No Abstract] [Full Text] [Related]
13. Defence research: still in the lead? Weinberger S Nature; 2008 Jan; 451(7177):390-3. PubMed ID: 18216826 [No Abstract] [Full Text] [Related]
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