text: All estimates depend on good monitoring capacities of the health system but also on reliable quantitative 
  overviews of exposure situations at workplaces. In research and monitoring of occupational cancer 
  some quantitative overviews on such exposures have been established (see for example, CAREX 
  Finland, its follow-up projects, e.g. in Canada, and the many approaches for exposure assessments).225 
  One of the reasons for the establishment of a clear relation between long working hours and stroke is 
  the comparatively excellent data situation concerning working hours and long working hours in 
  combination with administrative health data about stroke. 