1. Department of Neonatology Zhongshan Hospital Affiliated to Sun Yat‐Sen University Zhongshan P.R. China
2. Department of Neonatology Guangdong Medical College Zhanjiang P.R. China
3. Department of Neonatology The First Affiliated Hospital of Jinan University Guangzhou P.R. China
4. Molecular Inspection Center Zhongshan Hospital Affiliated to Sun Yat‐Sen University Zhongshan P.R. China