1. Department of Neonatology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China.
2. Department of Neonatology, Shandong Provincial Hospital, Shandong University, Jinan, China.
3. Department of Endocrinology, Shandong Provincial Hospital, Shandong University, Jinan, China.
4. Department of Neonatology, Yantai Yuhuangding Hospital, Yantai, China.
5. Department of Neonatology, Liaocheng People's Hospital, Liaocheng, China.
6. Department of Neonatology, Hebei PetroChina Central Hospital, Langfang, China.
7. Department of Neonatology, The First Affiliated Hospital of Shandong First Medical University, Jinan, China.
8. Department of Neonatology, W.F. Maternal and Child Health Hospital, Weifang, China.
9. Department of Neonatology, The Third Hospital of Bao Gang Group, Baotou, China.
10. Department of Neonatology, Linyi People's Hospital, Linyi, China.
11. Department of Neonatology, Women and Children's Healthcare Hospital of Linyi, Linyi, China.
12. Department of Neonatology, Jinan Maternity and Child Health Care Hospital, Jinan, China.
13. Department of Neonatology, Zibo Maternal and Child Health Hospital, Zibo, China.
14. Department of Neonatology, Qilu Hospital of Shandong University, Jinan, China.
15. Department of Neonatology, Shandong Provincial Maternal and Child Health Care Hospital Affiliated to Qingdao University, Jinan, China.
16. Cheeloo College of Medicine, Shandong University, Jinan, China.
17. Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China.
18. Shandong Provincial Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, China.