Re: Hengstler,J.G., Bolm-Auorff,U., Faldum,A., Janssen,K., Reifenrath,M., Gotte,W., Jung,D., Mayer-Popken,O., Fuchs,J., Gebhard,S., Bienfait,H.G., Schlink,K., Dietrich,C., Faust,D., Epe,B. and Oesch,F. Occupational exposure to heavy metals: DNA damage induction and DNA repair inhibition prove co-exposures to cadmium, cobalt and lead as more dangerous than hitherto expected. Carcinogenesis, 2003, 24, 63-73