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. 2020 Nov 18;7(1):e000712. doi: 10.1136/bmjresp-2020-000712

Figure 2.

Figure 2

Development of mean PaCO2over 12 months in HFNC and control groups, with change after 30 minutes of HFNC treatment also shown at each clinic visit and for control patients trying HFNC at study end.