. 2013 Feb 14;2013:459281. doi: 10.1155/2013/459281
Copyright © 2013 M. R. A. Gatto et al.
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 1.
Percentage of accidents by operator category.