1. Department of Neonatology, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai 201204, China P.R.
2. Department of Pediatrics, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 201204, China P.R.
3. Department of Neonatology, First People’s Hospital of Zhangjiagang, Soochow University School of Medicine, Jiangsu 215600, China P.R.
4. Department of Respiratory Medicine, Shanghai Children’s Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200040, China P.R.
5. Lallemand Health Solutions Inc., 6100 Avenue Royalmount, Montreal, QC H4P 2R2, Canada.
6. Biostime (Guangzhou) Health Products Ltd., 187 Lianguang Rd, East District, Economic and Technological Development District Guangzhou, China P.R.