NCIt definition : An alteration or difference from a norm or standard.;
Alternative definition : CDISC: A structural or developmental change that is commonly observed within the population
under study and is unlikely to adversely affect survival or health. (Gupta, R. C.
ed. (2011 )Reproductive and Developmental Toxicology. London, UK: Elsevier, Inc.);
NCIt note : Althought they are conceptually synonymous, deviation usually carries a negative connotation.;