1. Division of Newborn Medicine, Department of Pediatrics, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, China
2. Clinical Nursing Research Institute, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, China
3. Sichuan Clinical Research Center for Birth Defects, Luzhou, Sichuan, China
4. School of Nursing, Southwest Medical University, Luzhou, Sichuan, China
5. Department of Perinatology, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, China