title: Response to the Letter to the Editor by Yang et al.
authors.affiliation: Department of Anesthesiology Tongji Hospital of Tongji Medical College Huazhong University of Science and Technology Wuhan, China.
authors.forename: Xiaohui
authors.initials: X
authors.lastname: Chi
authors.affiliation: Department of Anesthesiology Tongji Hospital of Tongji Medical College Huazhong University of Science and Technology Wuhan, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Yang