. 2021 May 31;12:667602. doi: 10.3389/fpsyt.2021.667602
Copyright © 2021 Olsson, Meltendorf, Fuge, Kamp, Park, Richter, Gall, Ghofrani, Ferrari, Schmiedel, Kulla, Heitland, Lepsy, Dering, Hoeper and Kahl.
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Figure 1.
Flowchart of patient inclusion. PAH, pulmonary arterial hypertension.