My father has been suffering fro ANCA mediated crescentic glomerulous nephritis with serum creatinine 5.5 mg/dl, with protenuria and haematuria,after treatment with cyclophosphamide and prednisolone since May 20,2014,now his serum creatinine is 1.7mg/dl,how long he will have to keep continue the treatment,will he recover fully,please answer me.