Asmarawati, T. P., W. Widodo, M. Thaha, A. Aditiawardana, N. Mardiana, A. R. Ardhany, A. Tjempakasari, D. Santoso, P. Pranawa, and C. Irwanadi. “Comparison of Asymmetric Dimethylarginine Levels Between Stages Three, Four, and Five Non-Dialysis of Chronic Kidney Disease”. Acta Medica Indonesiana, vol. 48, no. 1, Sept. 2016, p. 28, https://www.actamedindones.org/index.php/ijim/article/view/134.