Nakamura, Toshimitsu, Masaharu Ito, Hideki Koyama, Toshihiro Yoshimura, and Hitoshi Okamura. “Significance of Urine Kallikrein in the Prediction of Pregnancy-induced Hypertension”. Thai Journal of Obstetrics and Gynaecology 3, no. 2 (July 1, 1991): 63–70. accessed April 16, 2025. https://he02.tci-thaijo.org/index.php/tjog/article/view/257859.