Acknowledgements
The authors thank Professor Teng-jiao Wang and Long Qing (Naval Medical
University, China) for data analysis.
Authors’ contributions : Study design: Hua Yang and Jin-Chao
Song. Data collection: Hai-yan Chen, Shu-heng Tang, and Fang Deng.
Statistical analysis: Hai-yan Chen. Manuscript drafting: Fang Deng and
Wen Liu. Supervision: Jin-Chao Song. Project administration: Jin-Chao
Song.