El-Zonkorany TA, Hassan AE, Mosad SM, Elazab ST, Amer MS. Immunomodulating Effect of Echinacea and Star Anise in Protection and Treatment of Infectious Bronchitis Virus in Poultry. JAVR [Internet]. 2023Aug.20 [cited 2024Nov.24];13(7):1359-67. Available from: https://advetresearch.com/index.php/AVR/article/view/1417