Pediatric Rheumatological Condition (i.e., Arthritis, SLE, Kawasaki's Disaese)

Overall, our understanding of how pain and sleep are experienced and how they can be treated in teenagers with rheumatic diseases is limited. This two-phased study aims to deepen our understanding of pain and sleep in this population using 'Better Nights, Better Days for Youth' (BNBD-Youth). 'BNBD-Youth' is a self-guided web-based sleep program for teenagers with sleep problems that uses educational and behavioural strategies, such as understanding sleep processes and changing unhelpful thoughts about sleep, to help improve sleep experiences. In Phase One, participants will use daily diaries to record their sleep and pain, and then use 'BNBDYouth' for five weeks to test whether it improves these outcomes. Then, in Phase Two, these participants will take part in an interview to further describe their experiences using 'BNBD-Youth' and their pain and sleep.

A single arm, open-label pilot study is designed to determine the safety and effectiveness of anti-CD19/BCMA CAR-NK cell injection in patients with refractory pediatric rheumatic diseases.