| http://www.w3.org/ns/prov#value | - The study will incorporate the existing survey, which has been running since 1991, but will ask those taking part to allow interviewers working for the National Centre for Social Research to take a saliva sample and allow a range of physical examinations. ???The sample could be sent to a medical laboratory to look at indicators of health, such as sugar and cholesterol levels, and for genetic tests
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