El-Azab, S.; Alqalshy, E.; El-Rahman, K. A.; Hussein, A.; Ibrahim, A.; Alazzazi, M. A.; Abdel-Wahab, A. S.; Mahmoud, H. M.; Abdelhameed, W. B.; Esmail, A. E. A. E. M. Immunohistochemical Analysis of CD34 and PCNA Expression in Salivary and Laryngeal Adenoid Cystic Carcinoma. Int. J. of Health Sci. 2021, 5, 501-513.