1. International Statistical Classification of Diseases and Related Health Problems 9th Revision,1978
2. International Statistical Classification of Diseases and Related Health Problems 10th Revision. Instruction Manual,1993
3. Comparability of mortality statistics. For the seventh and eigth revision of international classification of diseases, series 2;Kebba,1975
4. Implementation of ICD-10 for mortality in England and Wales from January 2001;Rooney;Health Statistics Quarterly,2000
5. Annual report of the Registrar General for Scotland. Appendix 2. 2000. In: http://www.gro-scotland.gov.uk/statistics/library/annrep/00annrep/00app2.html [acceded: 12 January 2005].