1. Pediatric rheumatic diseases;Warren;Pediatr. Clin. North Am.,1994
2. Vital statistics of Japan 1993 Ministry of Health and Welfare 423
3. Incidence of systemic connective tissue diseases in children: A nationwide prospective study in Finland;Pelkonen;J. Rheumatol.,1994
4. The epidemiology of systemic lupus erythematosus;Siegel;Semin. Arthritis. Rheum.,1973