1 National Immunization Program, Chinese Center for Disease Control and Prevention, Beijing, China.
2 China National Clinical Research Center of Respiratory Diseases, Department of Respiratory, Beijing Children's hospital, Capital Medical University, National Center for Children's Health, Beijing, China. kunlingshen1717@163.com.
3 Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China. yyh628628@sina.com.
4 Chinese University of Hong Kong, Hong Kong SAR, China.
5 Pediatrics and Child Health Research Institute, Central Clinical Hospital, Russian Academy of Sciences, Moscow, Russian Federation.
6 University of Missouri-Kansas City School of Medicine, Kansas City, MO, USA.
7 Prince Sultan Military Medical City (PSMMC), Ministry of Defense, Riyadh, Saudi Arabia.
8 Queensland Children's Hospital, Brisbane, Australia and Menzies School of Health Research, Darwin, Australia.
10 Children's Health Ireland and Trinity College Dublin, Dublin, Ireland.
11 George Washington University, Washington, DC, USA.
12 KK Women's and Children's Hospital, Singapore, Singapore.
13 Department of Pediatrics, University of Dublin Trinity College, Dublin, Ireland.
14 Monash University, Melbourne, Australia.
15 Department of Pediatrics, Hadassah Hebrew University Medical Center, Jerusalem, Israel.
16 Food Allergy Referral Centre Veneto Region Padua University Hospital, Padua, Italy.
17 UCL Great Ormond Street Institute of Child Health, Great Ormond Street Hospital (GOSH) BRC, University College London, London, UK.
18 Department of Pediatrics, Kawasaki Medical School, Kurashiki-city, Japan.
19 Lady Hardinge Medical College and Assoc Kalawati Saran Children's Hospital, Bangla Sahib Marg, New Delhi, India.
20 College of Medicine, National Cheng Kung University, Tainan City, Taiwan, China.
21 VITUP International Hospital, Dalian, Liaoning, China.
22 China Medicine Education Association Pediatric Committee, Beijing, China.
23 Department of Respiratory Disease, Shenzhen Children's Hospital, Shenzhen, China.
24 Research Unit of Critical Infection in Children, Chinese Academy of Medical Sciences, 2019RU016, National Clinical Research Center for Respiratory Diseases, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China.
25 Department of Respiratory Disease, Guangzhou Women and Children's Medical Center, Guangzhou, China.
26 Department of Pediatrics, Renmin Hospital of Wuhan University, Wuhan, Hubei, China.
27 Diagnosis and Treatment Center of Infectious Diseases, Beijing Ditan Hospital, Capital Medical University, Beijing, China.
28 Department of Clinical Immunology/Allergy, Children's Hospital of Fudan University, National Center for Children's Health, Shanghai, China.
29 Department of Infectious Diseases, Shenzhen Children's Hospital, Shenzhen, Guangdong, China.
30 Department of Respiratory Disease, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.
31 China National Clinical Research Center of Respiratory Diseases, Department of Respiratory, Beijing Children's hospital, Capital Medical University, National Center for Children's Health, Beijing, China.
32 Center for Health Care, Beijing Children's Hospital, Capital Medical University, Beijing, China.
33 School of Population Medicine and Public Health, Peking Union Medical College, Beijing, China.
34 Children's Hospital, Zhejiang University School of Medicine, Hangzhou, China.