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Participants were asked to provide written informed consent, adolescents aged 15\u201317 years provided written informed assent with prior written informed consent from their parents\/guardians.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics Approval and Consent to Participate"}},{"value":"All participants consented to the anonymous publication of the information they provided.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for Publication"}},{"value":"The authors declare that they have no competing interests.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interest"}},{"value":"This research was jointly funded by the UK Medical Research Council (MRC) and the Foreign Commonwealth and Development Office (FCDO) under the MRC\/FCDO Concordat agreement (grant ID: MR\/R022216\/1) as well as the London School of Hygiene and Tropical Medicine (PhD support to Lawrence Mwenge). The funders had no role in study design, data collection and analysis, or manuscript development.","order":5,"name":"Ethics","group":{"name":"EthicsHeading","label":"Funding"}},{"value":"Bernadette Hensen, Musonda Simwinga, Kwame Shanaube, Peter Hangoma, Helen Ayles, Richard Hayes & Sarah Fidler provided study leadership; Lawrence Mwenge, Musonda Simwinga, Bernadette Hensen, Helen Ayles, Richard Hayes & Sarah Fidler conceptualized the study; Lawrence Mwenge, Musonda Simwinga, Bernadette Hensen and Helen Ayles designed the study; Lawrence Mwenge, Lucheka Sigande, Ab Schaap, Mwelwa Phiri and  Melvin Simuyaba led the DCE formative qualitative interviews that contributed to the design of the discrete choice experiment; Lawrence Mwenge, Lucheka Sigande  and Matthew Quaife designed the discrete choice experiment; Lawrence Mwenge, Bernadette Hensen, Sean Floyd and Matthew Quaife participated in data analysis; Lawrence Mwenge drafted the paper; all authors reviewed and approved the manuscript.","order":6,"name":"Ethics","group":{"name":"EthicsHeading","label":"Author Contributions"}}]}}