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Article History

First Online: 8 February 2021

Ethics approval and consent to participate

: The EN-INDEPTH study was granted ethical approval by the Institutional Review Boards in all operating countries, as well as, from the Institutional Ethical Review Committee of the London School of Hygiene & Tropical Medicine (Additional file). Respondents of every successful interview gave written consent/ascent after being informed of the objective and data use, the procedure of the interview, risks and benefits of participating in the study, right to withdraw from interview anytime point of time, and not responding to questions where they feel discomfort. The study ensures the respondent’s privacy at data collection and confidentiality at data use.

: Not applicable.

: The authors declare no competing interests.