Laiwejpithaya, S., and S. Piyophirapong. “Pseudohyperkalemia Caused by EDTA Contamination: A Not Uncommon Pre-Analytical Error”. Siriraj Medical Journal, vol. 71, no. 4, July 2019, pp. 322-3, https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/205234.