El-Zonkorany, T. A. .; Hassan, A. E. .; Mosad, S. M. .; Elazab, S. T. .; Amer, M. S. . Immunomodulating Effect of Echinacea and Star Anise in Protection and Treatment of Infectious Bronchitis Virus in Poultry. JAVR 2023, 13, 1359-1367.