Hui, D., Maddocks, M., Johnson, M. J., Ekström, M., Simon, S. T., Ogliari, A. C., …Ripamonti, C. I. (2020). Management of breathlessness in patients with cancer: ESMO Clinical Practice Guidelines. ESMO Open, 5(6), Article e001038. https://doi.org/10.1136/esmoopen-2020-001038