Characteristic feature of Systemic Juvenile Idiopathic Arthritis is
Systemic Juvenile Idiopathic Arthritis

It begins at below 16 years of age
NSAIDs are given 
Ra factor is negative
Uveitus is seen in oligoarticular JIA
Uveitis is a feature
It occurs after 16 years of age
NSAIDs are contraindicated
RA factor is negative