∗Department of Vascular Surgery, Beijing Shijitan Hospital, Capital Medical University, Haidian District, Beijing, China

†Department of Anesthesiology, Beijing Haidian Maternal and Child Health Hospital, Haidian District, Beijing, China

Address reprint requests to Dr Bo Lei, Department of Anesthesiology, Beijing Haidian Maternal and Child Health Hospital, No. 33 Haidian South Road, Haidian District 100083, Beijing, China. E-mail: [email protected]

Received 4 November, 2021

Revised 22 November, 2021

Accepted 9 February, 2022

The authors report no conflicts of interests.

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