Authors’ contributions
Conception and design of the study: YG and SG. Data processing and analysis: SG and ML. Interpretation of the results: SG, ML, JL, YC, DK, and YG. Drafting of the article: SG, ML, YC, YG, and DK. Critical revision of the article for important intellectual content: SG, ML, JL, YC, WYL, MZ, HZ, MM, DK, and YG. DK and YG kept the data analyzed in the present study and take full responsibility for the content, integrity, and accuracy of the work reported. All authors approved the final manuscript.