- 1. Serum creatinine ≧6 mg/dl at Visit 12. Creatinine clearance < 15 ml/min at Visit 13. Urine output ≧ 1,000 ml/day4. Primary renal disease: chronic glomerulonephritis or non-diabetic stage Ⅴ chronic kidney disease (confirmed by biopsy or clinical presentations/symptoms)5. Bilaterally reduced renal size shown by sonography6. Male or female patients aged 20 – 657. Ability of the patient to understand the basic implications of the study and to follow instructions8. Willingness to participate as indicated by a signed written informed consent