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Backer V, Ulrik CS, Harving H, Lange P, Søes-Petersen U, Plaschke PP.Backer V, et al. Among authors: harving h.Allergy Asthma Proc. 2007 May-Jun;28(3):375-81. doi: 10.2500/aap.2007.28.3001.Allergy Asthma Proc. 2007.PMID: 17619570
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Ulrik CS, Claudius BK, Tamm M, Harving H, Siersted HC, Backer V, Hellquist B, Dahl R, Høgholm A, Jøhnk IK.Ulrik CS, et al. Among authors: harving h.Clin Respir J. 2009 Jul;3(3):161-8. doi: 10.1111/j.1752-699X.2009.00129.x.Clin Respir J. 2009.PMID: 20298399Clinical Trial.