RESULTS	In the placebo group , the mean elevation of serum creatinine was markedly higher ( 0.72 mg/dl ) 48 h after RCM administration compared with the three PGE ( 1 ) groups ( 0.3 mg/dl in the 10 ng/kg/min group , 0.12 mg in the 20 ng/kg/min group , and 0.29 mg/dl in the 40 ng/kg/min group ) .\