Bahadoran, S., Khoozan-Chermahini, M., Hassanpour, H. and Farhadi, N. 2026. Melatonin modulates pulmonary hypertension syndrome through increase of nitric oxide and its enzyme in chickens. Journal of the Hellenic Veterinary Medical Society. 77, 1 (Feb. 2026), 10083–10090. DOI:https://doi.org/10.12681/jhvms.37793.