Cohort 1 : A cohort is a group of individuals, identified by a common characteristic, who are studied over a period of time as part of an epidemiological investigation
Heriot-Watt University, School of Life Sciences, Some Terms Used In Toxicology and Chemical Safety, Edinburgh, UK 1992. http://www.who.int/ipcs/publications/methods/harmo nization/en/compilation_nov2001.pdf, (Tox and Chem Sfty - Amer) {85}