Gray part of the blue line meant that steroids were used in this period(dexamethasone, intravenously, 15mg/d for 5 days, followed by 10mg/d for 3 days and then 5 mg/d for 3 days). Besides, the data of the control came from a published paper and were put here just as a reference but not a real 'control'. In the table above, the data of a third group named “Essen” were from one of our previous studies.20 Here they were considered as reference to our case, because RVNA levels of both groups were detected by the same method and in the same laboratory.