The effects of the 45° semi-recumbent position on the clinical outcomes of mechanically ventilated patients: a systematic review and meta-analysis study - Zhuo, Xiuqiu; Pan, Lingai; Zeng, Xiaolan (Annals of Palliative Medicine; Vol 10, No 10 (October 31, 2021): Annals of Palliative Medicine, 2021)