title: The frequency of juvenile arthritis.
authors.forename: J T
authors.initials: JT
authors.lastname: Cassidy
authors.forename: A M
authors.initials: AM
authors.lastname: Nelson
mesh_terms: D000293:Adolescent; D001171:Arthritis, Juvenile / Q000453:epidemiology*; D002170:Canada; D002648:Child; D002675:Child, Preschool; D003240:Connective Tissue Diseases / Q000453:epidemiology; D004739:England; D006801:Humans; D008824:Michigan; D008910:Minnesota