1. School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, China
2. Academy of Medical Engineering and Translational Medicine, Tianjin University, China
3. Department of Obstetrics and Gynecology, Affiliated Hospital of Weifang Medical University, China
4. School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, China and
Academy of Medical Engineering and Translational Medicine, Tianjin University, China