1. Issues involved in the definition and classification of chronic health conditions;Perrin;Pediatrics,1993
2. Childhood chronic illness: prevalence, severity, and impact;Newacheck;Am J Public Health,1992
3. Chronic illness, disability, and mental and social well-being: findings from the Ontario Child Health Study;Cadman;Pediatrics,1987
4. Chronic illness and its consequences: observations based on three epidemiologic surveys;Pless;J PEDIATR,1971
5. Chronic illness and psychosocial problems among children in Genesee County;Walker,1981