In 2009, Tran Thanh Thuy and Vu Huy Tru studied on the characteristics of steroid-resistant INS with partial and localized glomerular fibrosis in children at Children's Hospital 1. Duong Thuy Nga (2011) studied on the results of treatment of steroid-resistant INS at the Kidney - Urology Department of National Children's Hospital in her master thesis.