Retrieve publicly published literature on the relationship between serum NT ProBNP concentration and coronary artery disease in Kawasaki disease from CNKI, Wanfang, VIP, China Biomedical Database, Pubmed, Embase, Cochrane Library, Web of Science, and OVID databases, as well as manually search for other resource literature. The gene discussed is NPPB; the disease is Kawasaki disease.