1. Health & Safety Executive. Health and Safety Executive Statistics 2012/2013. http://www.hse.gov.uk/statistics/overall/hssh1213.pdf (19 December 2013, date last accessed).
2. Health & Safety Executive. The Health and Occupation Research Network 2012 Report. Types of Ill Health in the UK. http://www.hse.gov.uk/statistics/sources.htm (19 December 2013, date last accessed).
3. Health & Safety Executive. Index of Data Tables. http://www.hse.gov.uk/statistics/tables/index.htm#thor (24 September 2014, date last accessed).
4. University of Manchester Centre for Occupational and Environmental Health (COEH). The Health and Occupational Research Network (THOR). http://www.populationhealth.manchester.ac.uk/epidemiology/COEH/research/thor/ (24 September 2014, date last accessed).
5. Changes in mental health of UK hospital consultants since the mid-1990s