KARUNAKAR, C.; T, D. Sonographic grading of renal cortical echogenicity and raised serum creatinine in patients with chronic kidney disease. International Journal of Health and Clinical Research, [S. l.], v. 4, n. 8, p. 211–214, 2021. Disponível em: https://www.ijhcr.com/index.php/ijhcr/article/view/1450. Acesso em: 17 mar. 2026.