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Lisspers K, Ställberg B, Hasselgren M, Johansson G, Svärdsudd K.Lisspers K, et al. Among authors: hasselgren m.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.
Hasselgren M, Arne M, Lindahl A, Janson S, Lundbäck B.Hasselgren M, et al.Scand J Prim Health Care. 2001 Mar;19(1):54-7. doi: 10.1080/028134301300034701.Scand J Prim Health Care. 2001.PMID: 11303549Free article.
Lisspers K, Ställberg B, Hasselgren M, Johansson G, Svärdsudd K.Lisspers K, et al. Among authors: hasselgren m.Prim Care Respir J. 2005 Jun;14(3):147-53. doi: 10.1016/j.pcrj.2005.03.003. Epub 2005 Apr 14.Prim Care Respir J. 2005.PMID: 16701714Free PMC article.
Ställberg B, Lisspers K, Hasselgren M, Janson C, Johansson G, Svärdsudd K.Ställberg B, et al. Among authors: hasselgren m.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.
Zakrisson AB, Engfeldt P, Hägglund D, Odencrants S, Hasselgren M, Arne M, Theander K.Zakrisson AB, et al. Among authors: hasselgren m.Prim Care Respir J. 2011 Dec;20(4):427-33. doi: 10.4104/pcrj.2011.00060.Prim Care Respir J. 2011.PMID: 21687920Free PMC article.Clinical Trial.
Sundh J, Montgomery S, Hasselgren M, Kämpe M, Janson C, Ställberg B, Lisspers K.Sundh J, et al. Among authors: hasselgren m.NPJ Prim Care Respir Med. 2016 Oct 20;26:16073. doi: 10.1038/npjpcrm.2016.73.NPJ Prim Care Respir Med. 2016.PMID: 27763623Free PMC article.