1. Department of Echocardiography, The First Affiliated Hospital of Xinjiang Medical University, Ürümqi, Xinjiang Uyghur Autonomous Region 830054, P.R. China
2. Department of Echocardiography, The First Affiliated Hospital of Xinjiang Medical University, Ürümqi, Xinjiang Uyghur Autonomous Region 830054, P.R. China
3. Department of Neonatology, The First Affiliated Hospital of Xinjiang Medical University, Ürümqi, Xinjiang Uyghur Autonomous Region 830054, P.R. China
4. School of Pediatrics, Xinjiang Medical University, Ürümqi, Xinjiang Uyghur Autonomous Region 830054, P.R. China
5. School of Pediatrics, Xinjiang Medical University, Ürümqi, Xinjiang Uyghur Autonomous Region 830054, P.R. China
6. Department of Neonatology, The First Affiliated Hospital of Xinjiang Medical University, Ürümqi, Xinjiang Uyghur Autonomous Region 830054, P.R. China