Expression of concern: “The influence of high-quality workplace relational systems and mindfulness on employee work engagement at the time of crises” [Heliyon 9 (2023) e15523]

Post-publication, an investigation conducted by Elseviers Research Integrity & Publishing Ethics team on behalf of the journal found that the authors omitted a statement in their article regarding ethical approval for the research presented in this publication, which is required under the policies of the journal. The Editor contacted the authors for an explanation, who explained they deemed the study low risk and hence, no ethical approval was obtained. The Editor also contacted the institution to verify the ethics requirements and whether an ethics approval waiver was provided for this study, but they did not respond.