Predictive ability of hypotension prediction index and machine learning methods in intraoperative hypotension: a systematic review and meta-analysis oleh Ida Mohammadi, Shahryar Rajai Firouzabadi, Melika Hosseinpour, Mohammadhosein Akhlaghpasand, Bardia Hajikarimloo, Roozbeh Tavanaei, Amirreza Izadi, Sam Zeraatian-Nejad, Foolad Eghbali