Straatmann C, Ayoob R, Gbadegesin R, Gibson K, Rheault MN, Srivastava T, Tran CL, Gipson DS, Greenbaum LA, Smoyer WE, Vehaskari VM. Treatment outcome of late steroid-resistant nephrotic syndrome: a study by the Midwest Pediatric Nephrology Consortium. Pediatr Nephrol. 2013 Aug; 28(8):1235-41.