Kearns–Sayre syndrome presenting with progressive external ophthalmoplegia and third-degree atrioventricular block diagnostic challenge in resource-limited settings: a case report. - Azibte, Gebeyehu Tessema; Ayalew, Zekarias Seifu; Molla, Bereket Abraha; Ayele, Meseret Zewdie; Bezabeh, Temesgen Baylie; Wube, Surafiel Adugna; Legesse, Biruk Abate; Meresa, Tigist Kahsay (Journal of Medical Case Reports, 2025)