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Contributors AL conducted most of the data collection and analysis. AL and HC recruited participants. LB assisted with data collection and analysis. JHS advised on the study throughout. HM and HC developed the intervention. All authors contributed to the content of the letter.
Funding NIHR Bristol Biomedical Research Unit in Nutrition, UK
Competing interests None declared.
Ethics approval University of Bristol Research Ethics Committee.
Provenance and peer review Not commissioned; internally peer reviewed.
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