Comparison of long-term effects between tacrolimus and cyclosporine based immunosuppression after HTx: B.M. Meiser, D. Schmidt, M. Pfeiffer*, W.v. Scheidt**, V. Klauss***, S. Wildhirt, P.U¨berfuhr, H. Reichenspurner, B. Reichart; Depts. of Cardiac Surgery and Internal Medicine**, Institute for Clinical Chemistry*, Univ. of Munich, Groβhadern Medical Center and Dept. of Int. Med., Innenstadt Med. Center***, 81366 Munich, Germany