The basal characteristics of patients.

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Tac: patients with tacrolimus. DBP: diastolic blood pressure. SBP: systolic blood pressure. GFR: calculated with 2009 CKD-EPI creatinine equation. UACR: urine albumin to creatinine ratio in mg/g creatinine unit. UPCR: urine protein to creatinine ratio in mg/g creatinine unit. RAS blocker: renin angiotensin system blocker using angiotensin II type I receptor blocker (ARB). Duration of illness: time-duration from renal biopsy to this clinical trial. BMI: body mass index. Hematuria: RBC 5 or more examined in 400-fold fields by light microscopic examination. Pathologic findings by Oxford classification: retrospectively reclassified findings in 33 patients using Oxford classification of IgA nephrothy.