Louw, SusanGounden, ReenelleVaughan, JeniferNtabeni, LumkaMayne, AnthonyMayne, Elizabeth S.2021-07-012021-07-012021-06Louw, S., Gounden, R., Vaughan, J. et al. 2021, 'The effect of freezing and thawing of samples for anti-factor Xa testing for the determination of enoxaparin activity', International Journal of Laboratory Hematology, vol. 43, no. 4, pp. e138-e140.1751-5521 (print)1751-553X (online)10.1111/ijlh.13439http://hdl.handle.net/2263/80656The quality and validity of laboratory results, especially for coagulation analyses, are influenced by pre-analytical variables including the collection technique, transportation, pre-analytical processing and storage of samples. Laboratory networks often rely on centralization of specialized testing, which necessitates on-site preparation of samples and transportation to referral centres. Low molecular weight heparin (LMWH) offers improved clinical predictability of anticoagulation and often does not require routine monitoring.en© 2020 John Wiley & Sons Ltd. This is the pre-peer reviewed version of the following article : 'The effect of freezing and thawing of samples for anti-factor Xa testing for the determination of enoxaparin activity', International Journal of Laboratory Hematology, vol. 43, no. 4, pp. e138-e140, 2021, doi : 10.1111/ijlh.13439. The definite version is available at : http://wileyonlinelibrary.com/journal/ijlh.AnticoagulationAnti-factor XaFreeze-thawPre-analytical variablesSample logisticsHealth sciences articles SDG-03SDG-03: Good health and well-beingHealth sciences articles SDG-04SDG-04: Quality educationHealth sciences articles SDG-09SDG-09: Industry, innovation and infrastructurePostprint Article