Nomura Y, Arata M, Masuda K, Koriyama C, Suruki N, Ueno K, Yoshikawa H, Eguchi T, Kawano Y. Kawasaki disease patients with six principal symptoms have a high risk of being a non‐responder. Pediatrics International. 2012 Jan 12;54(1):14–8. doi: 10.1111/j.1442-200x.2011.03512.x.