Nainggolan, Samanta Theresia, et al. “Analysis of Electrolyte Levels in Chronic Kidney Failure Patients Undergoing Hemodialysis at Elisabeth Hospital, Medan”. Jurnal Ilmiah Kesehatan, vol. 18, no. 2, Sept. 2026, pp. 532-4, doi:10.37012/jik.v18i2.3818.