1. International League of Associations of Rheumatology classification of juvenile idiopathic arthritis: second revision, Edmonton, 2001;Petty;J Rheumatol,2004
2. Preliminary definition of improvement in juvenile arthritis;Giannini;Arthritis Rheum,1997
3. Psychosocial factors related to rheumatic diseases in childhood;Miller;J Rheumatol,1993
4. The economic impact of juvenile chronic arthritis;Allaire;J Rheumatol,1992
5. A critical appraisal of the quality of quality of life measurements;Gill;JAMA,1994