Objective To investigate the feasibility and safety of substituting tacrolimus(FK506) for cyclosporin A(CsA) on delaying the pace of renal dysfunction in patients with biopsy-proven chronic allograft nephropathy(CAN).

• 目的:探讨他克莫司(FK506)替换环孢素A(CsA)治疗慢性移植肾肾病(CAN)的有效性及安全性。