Acknowledgements
We gratefully acknowledge the Postgraduate Medical Education program and BIDMC’s Health Technology Exploration Center (HTEC) in supporting this collaborative research. We gratefully thank Dr. Yanli Zhang, Dr. Changyu Tu, Huafeng Li, Zhiqiang Zhao, Ruihe Liu, Dr. Xiaoyan Chen, and Dr. Aiqin Hu at Linyi Maternal and Child Healthcare Hospital for their help in conducting this research. We gratefully thank Dr. Lin Zhang at the International Peace Maternity & Child Health Hospital of China Welfare Institute (IPMCH), Shanghai, China for insightful discussion in the study design. We gratefully thank Dr. Xi Zhang at the Clinical Research Unit of Xinhua Hospital affiliated to Shanghai Jiao Tong University for reviewing the statistics methods.