SCD and neurofibromatosis type 1: Mean levels of SCD (p < 0.001), ACA (p = 0.001), AOD500 (p = 0.001), AOD750 (p < 0.001), TISA500 (p < 0.001) and TISA750 (p < 0.001) were found to be significantly lower in NF1 group compared to control group.