Funding for this research was provided by:
National Institute for Health Research (241/M/93195)
Received: 29 June 2019
Accepted: 28 February 2020
First Online: 20 April 2020
Change Date: 25 May 2020
Change Type: Correction
Change Details: An amendment to this paper has been published and can be accessed via the original article.
Ethics approval and consent to participate
: The approval for this study was granted by the ethics committee of IR Iran’s National Institute for Health Research (approved No: 241/M/93195). The objectives of the study, data collection methods, data recording, and the role of researchers and interviewees were explained to all participants. Given the sensitive nature of informal payments, verbal consent was obtained from all individual participants prior to inclusion in the study. This was formally approved by the aforementioned ethics committee. The data were fully anonymized prior to the analysis and participants were assured about anonymity.
: Not applicable.
: HSS was a faculty member of IR Iran’s National Institute for Health Research. Other authors declare that they have no competing interests.