OECD (2000), ‚Guidance Document on the Recognition, Assessment and Use of Clinical Signs as Humane Endpoints for Experimental Animals Used in Safety Evaluation’, OECD Environment, Health and Safety Publications (EHS), Series on Testing and Assessment, No19, OECD Publishing, Paris.
pomer medzi počtom buniek v mitóze a celkovým počtom buniek v populácii, ktorý je meradlom stavu proliferácie tejto bunkovej populácie.