Mengxing Lv1, Lan Shen2, Jiwei Li1, Yucheng Xie1, Lizheng Wei3. 1. Department of Pathology, Kunming Children's Hospital, Kunming, China. 2. Department of Emergency, First People's Hospital of Honghe State, Honghe, China. 3. Department of Echocardiography, Kunming Children's Hospital, Kunming, China.