Received: 10 December 2021
Accepted: 8 November 2022
First Online: 19 November 2022
: All methods were performed in accordance with relevant guidelines and regulations. The study received ethical approval from the University of St Andrews, UK (No. MD14548, 10/09/19); National Institute for Medical Research, Tanzania (No. 2831, updated 26/07/19), Mbeya Medical Research and Ethics Committee (No. SZEC-2439/R.A/V.1/30), Kilimanjaro Christian Medical College, Tanzania (No. 2293, updated 14/08/19) and Catholic University of Health and Allied Sciences /Bugando Medical Center research ethics and review committee (No. CREC /266/2018, updated on 02/2019).Participants were not consented basing on the criteria for Institutional Ethics Research Committee (IREC) approval of research in Tanzania that researches are allowed when the risk to participants is minimal and the benefits greatly out-ways the risk [CitationRef removed]. The scenario did not require sellers to do or say anything outside of what they would otherwise be doing as part of their usual practice. However, there was prior information through fliers on the research to be conduction. Furthermore, the responses gathered at particular sites and from particular individuals, are not identifiable in the data presented.
: Not applicable.
: The authors declare no competing interest.