Alterations in mitochondrial DNA content in canine heart failure. - Boonyapakorn, Chavalit; Meechai, Julalak; Sansuktaweesup, Panida; Karaket, Pitchaporn; Woravuthvitaya, Worawan; Chirathanaphirom, Suphakan; Chuammitri, Phongsakorn; Piamsiri, Chanon; Pongkan, Wanpitak (BMC Veterinary Research, 2025)