PT - JOURNAL ARTICLE ED - BMJ Publishing Group Ltd TI - Defining disease: determining practice AID - 10.1136/dtb.2001.39646 DP - 2001 Jun 01 TA - Drug and Therapeutics Bulletin PG - 46--48 VI - 39 IP - 6 4099 - http://dtb.bmj.com/content/39/6/46.short 4100 - http://dtb.bmj.com/content/39/6/46.full SO - Drug Ther Bull2001 Jun 01; 39 AB - Management of patients traditionally starts with establishing a diagnosis, a process that relies heavily on how diseases are defined. But definitions of disease vary with time and are influenced by, amongst other things, culture, politics, sociology and economics. The ninth annual Drug and Therapeutics Bulletin symposium, 'Defining disease: determining practice', explored the ways disease is defined and how this might affect practice. Here, we summarise the key points raised in the presentations and subsequent discussion.