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Schaubel D, Johansen H, Mao Y, Dutta M, Manfreda J.Schaubel D, et al. Among authors: johansen h.J Asthma. 1996;33(2):97-103. doi: 10.3109/02770909609054537.J Asthma. 1996.PMID: 8609104
Schaubel D, Johansen H, Dutta M, Desmeules M, Becker A, Mao Y.Schaubel D, et al. Among authors: johansen h.J Asthma. 1996;33(4):255-64. doi: 10.3109/02770909609055366.J Asthma. 1996.PMID: 8707780
Chen Y, Stewart P, Johansen H, McRae L, Taylor G.Chen Y, et al. Among authors: johansen h.J Clin Epidemiol. 2003 Feb;56(2):180-7. doi: 10.1016/s0895-4356(02)00593-0.J Clin Epidemiol. 2003.PMID: 12654413
Chen Y, Dales R, Stewart P, Johansen H, Scott G, Taylor G.Chen Y, et al. Among authors: johansen h.Pediatr Pulmonol. 2003 Jul;36(1):22-6. doi: 10.1002/ppul.10307.Pediatr Pulmonol. 2003.PMID: 12772219
Chen Y, Stewart P, Dales R, Johansen H, Scott G, Taylor G.Chen Y, et al. Among authors: johansen h.Respir Med. 2004 May;98(5):446-53. doi: 10.1016/j.rmed.2003.11.005.Respir Med. 2004.PMID: 15139574Free article.
Chen Y, Li Q, Johansen H.Chen Y, et al. Among authors: johansen h.Int J Tuberc Lung Dis. 2009 Mar;13(3):394-9.Int J Tuberc Lung Dis. 2009.PMID: 19275803