Conflict of interest
All authors declare no conflict of interests
Nannan Lou1, Xiang Ma1, 2*, Qingxin Luo3, 4, Xiaoling Wei1, 2, Yun Zhang1, 2, Jing Guo1, 2, Jing Wang1, 2, Zhongtao Gai1, 2*
1. Department of Respiratory Diseases, Children’s Hospital Affiliated to Shandong University (Jinan Children’s Hospital), Jinan, Shandong, 250022, China.
2. Jinan Key Laboratory of Pediatric Respiratory diseases, Jinan Children’s Hospital, Jinan, Shandong, 250022, China.
3. Department of Biostatistics, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, 250000, People’s Republic of China.
4. Institute for Medical Dataology, Cheeloo College of Medicine, Shandong University, Jinan, 250000, People’s Republic of China.
* They are co-corresponding authors.