The article “Effect of a Breathing Exercise on Respiratory Function and 6-Minute Walking Distance in Patients Under Hemodialysis: A Randomized Controlled Trial” published a 2021 issue of The Journal of Nursing Research because of evidence that it is a duplicate publication, as defined by the Committee On Publication Ethics (COPE) Guidelines (https://publicationethics.org/resources/flowcharts/redundant-duplicate-publication-published-article).

Arazi T., Aliasgharpour M., Mohammadi S., Mohammadi N., Kazemnejad A. (2021). Effect of a breathing exercise on respiratory function and 6-minute walking distance in patients under hemodialysis: A randomized controlled trial. The Journal of Nursing Research, 29(2), Article e146. https://doi.org/10.1097/jnr.0000000000000423

We gratefully appreciate the information provided by Professor R. J. Gray, La Trobe University, Melbourne, Australia.