Correlation between MPA Ctrough and total MPA Css. The twice-daily MMF group is represented by squares and 3-times-daily MMF group by circles. (A) MPA assessments on day 7. Seventy-five patients are represented (r = 0.57; P < .001). (B) MPA assessments on day 21. Seventy-five patients are represented (r = 0.70; P < .001). The values off the x-axis scale are shown in the dotted line box.