“Comparison of Caudal Ropivacaine With Ketamine and Ropivacaine With Midazolam for Pediatric Infraumbilical Surgery Analgesia”. Annals of Medicine and Medical Sciences (June 3, 2025): 433–436. Accessed January 21, 2026. http://ammspub.com/index.php/amms/article/view/195.