1. Neonatal Intensive Care Unit, Affiliated Shenzhen Maternity & Child Healthcare Hospital, Southern Medical University, Shenzhen, China
2. Department of Neonatology and NICU, Beijing Chaoyang District Maternal and Child Healthcare Hospital, Beijing, China
3. Department of Pediatrics, Medical School of Chinese PLA, Beijing, China
4. Department of Neonatology, The Fifth Medical Center of The PLA General Hospital, Beijing, China
5. Department of dermatology, Shenzhen People's Hospital, Shenzhen, China