Poudel, B. et al. 2011. Estimation and Comparison of Serum Levels of Sodium, Potassium, Calcium and Phosphorus in Different Stages of Chronic Kidney Disease. Nepal Journal of Epidemiology. 1, 5 (Dec. 2011), 160–167. DOI:https://doi.org/10.3126/nje.v1i5.6154.