More detail on the IARC Monograph Volume 103 evaluation of occupational exposures to bitumen and bitumen emissions has been published in The Lancet, December 2011.
The Lancet article provides some background to the data used during the IARC review process and provides a better understanding of how the conclusions of the monograph were derived. This Monograph 103 replaces that carried out in 1985 (Monograph 35) and its review of exposure to emissions was separated according to the type of use of bitumen.