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Gudmundsson G, Gislason T, Janson C, Lindberg E, Hallin R, Ulrik CS, Brøndum E, Nieminen MM, Aine T, Bakke P.Gudmundsson G, et al. Among authors: janson c.Eur Respir J. 2005 Sep;26(3):414-9. doi: 10.1183/09031936.05.00078504.Eur Respir J. 2005.PMID: 16135721Free article.
Ställberg B, Lisspers K, Hasselgren M, Janson C, Johansson G, Svärdsudd K.Ställberg B, et al. Among authors: janson c.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.
Gunnbjörnsdóttir MI, Norbäck D, Björnsson E, Soon A, Jarvis D, Jõgi R, Gislason D, Gislason T, Janson C.Gunnbjörnsdóttir MI, et al. Among authors: janson c.Clin Respir J. 2009 Apr;3(2):85-94. doi: 10.1111/j.1752-699X.2008.00122.x.Clin Respir J. 2009.PMID: 20298383