Initial High-Flow Nasal Oxygen versus Noninvasive Ventilation in Acute Hypercapnic Respiratory Failure: A Prospective Observational Study - Burcu Yılmaz; Serkan Emre Eroğlu; Serdar Özdemir; Ezgi Cesur; Mehmet Muzaffer İslam and Abdullah Algın and Gökhan Aksel (Ibnosina Journal of Medicine and Biomedical Sciences, 2026)