Letter to the article by Sasaki et al

Affiliations

• ¹ Department of Anesthesiology, School of Medicine, Chengdu Women and Children's Central Hospital, University of Electronic Science and Technology, Chengdu, Sichuan, China.
• ² Department of Obstetrics, School of Medicine, Chengdu Women and Children's Central Hospital, University of Electronic Science and Technology, Chengdu, Sichuan, China. [email protected].