Siregar, R. S. ., O. R. Ramayani, Winson Chitra, and R. . Ramayati. “Relationship Between Serum 25(OH)D Levels and Blood Pressure in Children With Nephrotic Syndrome”. Open Access Macedonian Journal of Medical Sciences, vol. 9, no. B, Apr. 2021, pp. 260-4, doi:10.3889/oamjms.2021.5672.