Funding for this research was provided by:
kfw development bank (2017 40 828)
Received: 2 September 2021
Accepted: 3 November 2021
First Online: 14 November 2021
: Ethical approval for this study (Protocol ID: ERC.0003208) was obtained from the WHO Ethical Review Committee on on 25.09.2019 and Gazi University Ethical Board (Issue number 91610558-604.01.02) on 11.09.2019. All participants included in the study gave consent to participate.
: Not applicable.
: The authors declare that they have no competing interests.