Ikematsu Y, Pengrattanachot N, Reien Y, Seito J, Saito S, Hirayama Y, Ouchi M, Sakamoto S, Hashimoto H, Anzai N. Functional characterization of human organic anion transporter 4 (hOAT4) as a pH-dependent citrate transporter in renal proximal tubules. J Pharmacol Sci., 161(1):7-12, 2026.