Heart Rate Variability (HRV) in Patients with Sleep Apnea and COPD: A Comprehensive Analysis. - Zabara-Antal, Andreea; Crisan-Dabija, Radu; Arcana, Raluca-Ioana; Melinte, Oana Elena; Pintilie, Adriana-Loredana; Grosu-Creanga, Ionela Alina; Zabara, Mihai Lucian; Trofor, Antigona (Journal of Clinical Medicine, 2025)