1. International League of Associations for Rheumatology classification of juvenile idiopathic arthritis: second revision Edmonton;2001;Petty;J Rheumatol,2004
2. Ultrasonography of the hip in the evaluation of children with seronegative juvenile rheumatoid arthritis;Friedman;J Rheumatol,2002
3. Ultrasonography in the early diagnosis of hip joint involvement in juvenile rheumatoid arthritis;Fedrizzi;J Rheumatol,1997
4. Hip involvement in juvenile idiopathic arthritis;Rostom;Clin Rheumatol,2008
5. Hip diseases: clinical evaluation and imaging exams;Bruns;Rev Bras Reumatol,2003