1. Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China (mainland)
2. Intensive Care Unit, Affiliated Children’s Hospital of Capital Institute of Pediatrics, Beijing, China (mainland)
3. Department of Respiratory Intervention, Qilu Children's Hospital of Shandong University, Jinan, Shandong, China (mainland)
4. Department of Pediatrics, China-Japan Friendship Hospital, Beijing, China (mainland)