Hiraki LT, Benseler SM, Tyrrell PN, Hebert D, Harvey E, Silverman ED. Clinical and Laboratory Characteristics and Long-Term Outcome of Pediatric Systemic Lupus Erythematosus: A Longitudinal Study. The Journal of Pediatrics. 2008 Apr;152(4):550–6. doi: 10.1016/j.jpeds.2007.09.019.