Medicine
Juvenile dermatomyositis
Myopathy
Internal medicine
Retrospective cohort study
Hydroxychloroquine
Rituximab
Population
Dermatomyositis
Rheumatology
Myositis
Inflammatory myopathy
Pediatrics
Dermatology
Disease
Lymphoma
Environmental health
Coronavirus disease 2019 (COVID-19)
Infectious disease (medical specialty)