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Cai, Ran A. ORCID: https://orcid.org/0000-0001-9278-8066, Beste, Dominik ORCID: https://orcid.org/0000-0002-5738-8806, Chaplin, Hema ORCID: https://orcid.org/0000-0002-9402-9669, Varakliotis, Socrates ORCID: https://orcid.org/0000-0002-5265-8205, Suffield, Linda ORCID: https://orcid.org/0000-0002-8306-9438, Josephs, Francesca ORCID: https://orcid.org/0000-0003-1034-722X, Sen, Debajit ORCID: https://orcid.org/0000-0003-4760-1674, Wedderburn, Lucy R. ORCID: https://orcid.org/0000-0002-7495-1429, Ioannou, Yiannakis ORCID: https://orcid.org/0000-0002-1557-1928, Hailes, Stephen ORCID: https://orcid.org/0000-0001-7375-3642 and Eleftheriou, Despina ORCID: https://orcid.org/0000-0002-5312-2269 (2017) Developing and evaluating JIApp: Acceptability and usability of a smartphone app system to improve self-management in young people with juvenile idiopathic arthritis. JMIR mHealth and uHealth, 5 (8):e121. ISSN 2291-5222 (Online) (doi:10.2196/mhealth.7229)