"Zhu, Qiongfang" . "Ma, Qiaomei" . . "ebf554f2219a8ecb633d8d93a25467d6e25b579e" . "PMC7395215" . "32738878" . "BMC Anesthesiol" . . "Wu, Zehui" . "Zhang, Miaoyin" . "10.1186/s12871-020-01108-5" . . "Supine versus semi-Fowler\u2019s positions for tracheal extubation in abdominal surgery-a randomized clinical trial" . . "cc-by" . "2020-08-01"^^ . . "PMC" . "Kang, Yubo" . "Huang, Zheyan" . "32738878" . "Wang, Minxue" . . . . "Huang, Fei" . "Gan, Tiantian" .