Tummarintra, P., Limratana, P., Sujirattanawimol, K. and Srisawat, C. (2018) “The Contamination of Intravenous Fluid by Felt-Tip Marking Pen Ink: A Pilot Study”, Siriraj Medical Journal, 70(4), pp. 349–354. available at: https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/153939 (accessed: 10 October 2026).