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Table representation of search results timeline featuring number of search results per year.

Year Number of Results
1996 2
2009 1
2012 1
2013 1
2017 1
2018 1
2021 0
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Page 1
Noninvasive ventilation in pulmonary rehabilitation of COPD patients.
Köhnlein T, Schönheit-Kenn U, Winterkamp S, Welte T, Kenn K. Köhnlein T, et al. Among authors: schonheit kenn u. Respir Med. 2009 Sep;103(9):1329-36. doi: 10.1016/j.rmed.2009.03.016. Epub 2009 Apr 11. Respir Med. 2009. PMID: 19362809 Free article.