Links
[1] https://www.ecfs.eu/sites/default/files/cf-research-article-files/JCF-D-20-00478R1_FINAL_Packham_190321.pdf
[2] https://pubmed.ncbi.nlm.nih.gov/33454201/
[3] https://www.ecfs.eu/research-article-keywords/construct-validity
[4] https://www.ecfs.eu/research-article-keywords/content-validity
[5] https://www.ecfs.eu/research-article-keywords/fev1
[6] https://www.ecfs.eu/research-article-keywords/helium
[7] https://www.ecfs.eu/research-article-keywords/hyperpolarised-gas-mri
[8] https://www.ecfs.eu/research-article-keywords/mri-reliability
[9] https://www.ecfs.eu/research-article-keywords/systematic-review
[10] https://www.ecfs.eu/research-article-keywords/ventilation-defect
[11] https://www.ecfs.eu/research-article-keywords/xenon
[12] https://www.ecfs.eu/resource-guideline-type/other-guidelines