| biological response modifiers | Substances that stimulate the body's response to infection and disease. The body naturally produces small amounts of these substances. Scientists can produce some of them in the laboratory in large amounts and use them in cancer treatment. Also called BRMs. (12 Dec 1998) |
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| effect modifiers | <epidemiology> Factors that modify the effect of the putative causal factor(s) under study. (12 Dec 1998) |