Wongchampa, P. ., A. . Chaiwongkot, and R. . Reantragoon. “Determination of initial HBsAg cutoff index threshold for reporting HBsAg reactivity”. Chulalongkorn Medical Journal, vol. 68, no. 2, Apr. 2024, https://he05.tci-thaijo.org/index.php/CMJ/article/view/1475.