Development of simple method for the determination of 5-Methyl tetrahydrofolate in Dried Blood Spot by High Performance Liquid Chromatography (HPLC). International Journal of Pharmaceutical Sciences and Drug Research, [S. l.], v. 13, n. 3, p. 318–325, 2021. DOI: 10.25004/IJPSDR.2021.130312. Disponível em: https://ijpsdronline.com/index.php/journal/article/view/2949.. Acesso em: 16 oct. 2025.