T. Pillay, H. M. Rossouw, N. Steyn, and A. Carelse, “National Health Laboratory Service (NHLS) changes the method of LDL-cholesterol calculation in South Africa”, S Afr Med J, vol. 114, no. 1, p. 16, Dec. 2023, doi: 10.7196/SAMJ.2024.v114i1.1573.