sister chromatid
exchanges (SCEs) and micronuclei (MN) in cytokinesis-blocked lymphocytes. Frequencies of CAs, SCEs and MN were
compared between exposed and control groups, and evaluated in relation to blood lead level (as an indicator of engine
exhausts exposure) for the whole group under study, and to yearly averaged exposure to benzene (8-h time weighted
averages. as determined by repeated personal sampling) for fillingstation attendants only.