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.
Ställberg B, Nokela M, Ehrs PO, Hjemdal P, Jonsson EW.Ställberg B, et al.Health Qual Life Outcomes. 2009 Mar 25;7:26. doi: 10.1186/1477-7525-7-26.Health Qual Life Outcomes. 2009.PMID: 19320988Free PMC article.
Ställberg B, Lisspers K, Hasselgren M, Janson C, Johansson G, Svärdsudd K.Ställberg B, et al.Prim Care Respir J. 2009 Dec;18(4):279-86. doi: 10.4104/pcrj.2009.00024.Prim Care Respir J. 2009.PMID: 19455269Free PMC article.
Lisspers K, Ställberg B, Hasselgren M, Johansson G, Svärdsudd K.Lisspers K, et al. Among authors: stallberg b.Prim Care Respir J. 2010 Mar;19(1):37-44. doi: 10.4104/pcrj.2009.00043.Prim Care Respir J. 2010.PMID: 19623471Free PMC article.