W.T. BELLAMY and W.S. DALTON, Multidrug Resistance in the Laboratory and Clinic. J. MAIR, B. PUSCHENDORF, And G. MICHEL, Clinical Signifigance of Cardiac Contractile Proteins for the Diagnosis of Myocardial Injury. A.M. AL-SHIRBINY, Prostatic Specific Antigen. H.H. GOH, The Gonadotropin Surge in Human Reproduction . I. VERMES and C HAANEN, Apoptosis and Programmed Cell Death in Health and Disease. M. AIZAWA, Immunosensors for Clinical Analysis. Subject Index.