An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Couper KN, Nielsen HV, Petersen E, Roberts F, Roberts CW, Alexander J.Couper KN, et al. Among authors: nielsen hv.Vaccine. 2003 Jun 20;21(21-22):2813-20. doi: 10.1016/s0264-410x(03)00163-4.Vaccine. 2003.PMID: 12798622
Beghetto E, Nielsen HV, Del Porto P, Buffolano W, Guglietta S, Felici F, Petersen E, Gargano N.Beghetto E, et al. Among authors: nielsen hv.J Infect Dis. 2005 Feb 15;191(4):637-45. doi: 10.1086/427660. Epub 2005 Jan 14.J Infect Dis. 2005.PMID: 15655789
Nielsen HV, Di Cristina M, Beghetto E, Spadoni A, Petersen E, Gargano N.Nielsen HV, et al.Exp Parasitol. 2006 Apr;112(4):274-9. doi: 10.1016/j.exppara.2005.11.009. Epub 2005 Dec 20.Exp Parasitol. 2006.PMID: 16368092