Efficacy and safety of creatine supplementation in childhood-onset systemic lupus erythematosus: a randomized, double-blind, placebo-controlled, crossover trial - Hayashi, A. P.; Solis, M. Y.; Sapienza, M. T.; Otaduy, M. C. G.; Pinto Sa, A. L. de; Silva, Clovis Artur Almeida da; Sallum, A. M. E.; Pereira, R. M. R.; Gualano, Bruno (Lupus, 2014)