What general principles should be applied in the selection of patients and healthy volunteers in biomedical research?
When selecting subjects for a research project the following general principles should be taken into account: • Age: Consideration should be given to the age of the subjects proposed for the investigation. In particular, persons under 18 years of age should not be involved except when problems specific to their age groups are under investigation. It has been suggested that, whenever possible, volunteers should be aged over 50 years. • Numbers: The numbers of individuals participating in a research project should be restricted to the minimum necessary to obtain the information required. • Multiple studies: Consideration should be given to the risks to an individual who is involved in a series of research investigations. Steps should be taken to prevent individuals repeatedly taking part in research projects thus leading to substantial cumulated radiation dose. • Women:The possibility of early pregnancy should always be borne in mind if women of childbearing potential must be used as sub
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