作者单位:Chongqing Med Univ, Childrens Hosp, Dept Child Healthcare, Chongqing, Peoples R China[1]Chongqing Med Univ, Key Lab Child Dev & Disorders, China Int Sci & Technol Cooperat Base Child Dev[2]Chongqing Med Univ, Affiliated Hosp 2, Dept Cardiol, Chongqing, Peoples R China[3]