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Centre of Evidence Based Dermatology, University of Nottingham, Nottingham, United Kingdom
School of Health Sciences and Social Work, University of Portsmouth, Portsmouth, United Kingdom
Medical Research Council Clinical Trials Unit, London, United Kingdom
Medicine, Health Policy and Practice, University of East Anglia, Norwich, United Kingdom
UK Water Treatment Association, Loughborough, United Kingdom
¶Membership of the SWET Trial Team is provided in the Acknowledgments.