Echocardiographic alterations after administration of azithromycin in donkeys: An experimental crossover study. - Marzok, Mohamed; El-Ashker, Maged; Kandeel, Mahmoud; Almubarak, Adel; Alkhodair, Khalid; Farag, Alshimaa; Ibrahim, Hussam; El-khodery, Sabry; Babiker, Hussein (Thai Journal of Veterinary Medicine, 2026)