T. A. . El-Zonkorany, A. E. . Hassan, S. M. . Mosad, S. T. . Elazab, and M. S. . Amer, “Immunomodulating Effect of Echinacea and Star Anise in Protection and Treatment of Infectious Bronchitis Virus in Poultry”, JAVR, vol. 13, no. 7, pp. 1359-1367, Aug. 2023.