Predictors of 2 year outcomes of juvenile idiopathic arthritis in a multicenter Canadian cohort: the ReACCh out experience - Shiff Natalie J; Oen Kiem G; Guzman Jaime; Johnson Nicole A; Huber Adam; Tse Shirley; Tucker Lori B; Yeung Rae SM; Duffy Ciaran M (BMC, 2012)