 1. Previous treatment with MMF, CTX, tacrolimus, Cyclosporin A CsA, large doses of immunoglobulin and methylprednisolone MP, plasmapheresis or renal replacement therapy within the past 12 weeks. Oral glucocorticoids, azathioprine, intravenous MP 80mgd, short-time CsA 2 weeks or leflunomide 4 weeks are allowed 