STOP-JIA will use Web-based electronic CRFs (eCRFs) developed for the CARRA Registry that are already familiar to site personnel. The eCRF platform, RAVE, is 21CFR part11 compliant and meets regulatory requirements. Database and Web servers are secured by a firewall and through controlled physical access. eCRFs will be monitored for completeness, accuracy, and attention to detail throughout the study by DCRI data and site management teams using processes developed for the CARRA Registry and consistent with DCRI's internal SOPs. Use of electronic data capture will allow for immediate prompts/queries if entered values are out of expected ranges or there are incomplete data fields. The design of the data collection instrument will allow centers to record a planned assessment of a patient was missed and to enter any known reasons for the assessment being missed. DCRI will regularly provide reports detailing data completion metrics to the sites. Stakeholder engagement is also an important aspect of this study, and patients/caregivers as well as other stakeholders are serving as research partners and advisors in this study.