Statistical analysis will be performed by SPSS for Windows software version 11.5 (SPSS Inc., Chicago, IL). All data will be expressed in mean +/- standard deviation unless otherwise specified. Serial changes of nutritional parameters, dialysis adequacy, and inflammatory markers will be compared to the baseline values by analysis of variance for multiple measures (MANOVA). Serial change in residual GFR is examined by Wilcoxon's rank sum test with Bonferroni's correction for multiple comparison because of skewed data. Nutritional status and systemic inflammatory markers after one year will be compared between the 2 groups by Student's t-test for parametric data. Hospitalization and peritonitis rate between the groups are compared by Kruskal-Wallis test because the data will be highly skewed. Actuarial patient survival will be compared by logrank test with Kaplan-Meier survival curves and treatment group as stratifying variable.