Age‐Related Involutory Changes in Bursa of Fabricius of Anas crecca: Histomorphometric and Ultrastructural Investigation. - Abdel‐Fattah, Zeinab; El‐Bakry, Ahlam Mostafa; Abuelsaad, Abdelaziz S. A.; Abdel‐Aziz, Ayman M.; Awad, Ezzat M.; Ebaid, Hossam; Abo‐Eleneen, Rasha E. H. (Veterinary Medicine & Science, 2025)