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This study protocol is registered on ClinicalTrials.gov, with the following ID: NCT03761212 and follow the SPIRIT checklist. Written informed consent will be obtained from all participants by the physiotherapist or a medical doctor. Any modification to the initial protocol will be presented to the local ethics committee and has to be accepted before application and will be registered on ClinicalTrials.gov.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval and consent to participate"}},{"value":"Data of the participants are anonymized with a participant number. A clinical research associate, mandated by the Grenoble Alpes University Hospital, will monitor the study depending on inclusion rhythm and following a pre-prepared plan. Each monitoring will be associated with a written record. Besides, an audit or an inspection by health authorities can be conducted, independently of the sponsor and promotor, at any time to ensure research quality, result validity, and law respect.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Data management"}},{"value":"The data collection started in August 2018 and will be completed with the inclusion and follow-up of all the participants (60 patients with axSpA and 30 healthy controls). We plan the results of this study to be presented at international oriented scientific and clinical conferences and to be published in peer-reviewed scientific journals.","order":5,"name":"Ethics","group":{"name":"EthicsHeading","label":"Trial status"}}]}}