Author contribution:
- Conceptualization: Dong Qu, Xin-Yu Yuan
- Data curation: Yu-Chun Yan, Wen-Han Hao, Feng-Sen Bai, Shuang Liu
- Formal analysis: Yu-Chun Yan
- Funding acquisition: Yu-Chun Yan
- Investigation: Yu-Chun Yan, Feng-Sen Bai, Shuang Liu
- Methodology: Yu-Chun Yan
- Project administration: Xin-Yu Yuan
- Resources: Dong Qu, Xin-Yu Yuan
- Software: Wen-Han Hao, Yu-Chun Yan,
- Supervision: Dong Qu, Xin-Yu Yuan
- Validation: Yu-Chun Yan, Feng-Sen Bai
- Visualization: Yu-Chun Yan, Wen-Han Hao, Feng-Sen Bai
- Writing-original draft: Yu-Chun Yan
- Writing-review & editing: Xin-Yu Yuan
Ethics Committee : Capital Institute of Pediatrics
(KSSHERLL2018005)
Word count (abstract) : 211
Word count (main text) : 1771
Table number : 3
Figure number : 5