1. Department of Anesthesiology, Obstetrics and Gynecology Hospital, Affiliated to Nanjing Medical University, Nanjing, China
2. Nursing Center, Operating Room, Obstetrics and Gynecology Hospital, Affiliated to Nanjing Medical University, Nanjing, China
3. Department of Nursing Science, Affiliated Hospital of Jiangsu University, Zhenjiang, China
4. Group of Neuropharmacology and Neurophysiology, Division of Neuroscience, The Bonoi Academy of Science and Education, Chapel Hill, NC, USA