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.
Dalal AA, St Charles M, Petersen HV, Roberts MH, Blanchette CM, Manavi-Zieverink K.Dalal AA, et al. Among authors: petersen hv.Int J Chron Obstruct Pulmon Dis. 2010 Aug 9;5:179-87. doi: 10.2147/copd.s10988.Int J Chron Obstruct Pulmon Dis. 2010.PMID: 20714371Free PMC article.
Roberts M, Mapel D, Petersen H, Blanchette C, Ramachandran S.Roberts M, et al. Among authors: petersen h.J Med Econ. 2011;14(6):769-76. doi: 10.3111/13696998.2011.622817. Epub 2011 Sep 27.J Med Econ. 2011.PMID: 21942463Free article.
Sood A, Petersen H, Blanchette CM, Meek P, Picchi MA, Belinsky SA, Tesfaigzi Y.Sood A, et al. Among authors: petersen h.Am J Respir Crit Care Med. 2010 Nov 1;182(9):1098-104. doi: 10.1164/rccm.201002-0222OC. Epub 2010 Jul 1.Am J Respir Crit Care Med. 2010.PMID: 20595226Free PMC article.