1 Department of Neurology (RAE), California Pacific Medical Center, San Francisco, California; Department of Rheumatology (AB), Cleveland Clinic, Cleveland, Ohio; Ambulatorio de Neuropediatria (EG), Hospital Universitário-UFSC, Florianópolis, Brasil; and Serviço de Neurologia (EG), Hospital Infantil Joana de Gusmão, Florianópolis, Brasil.