Elsherbiny, S., A. . Zain Abdelhak, and O. . . Mostafa Ismail. “Analgesic Efficacy of Pre-Operative Oral Pregabalin in Dacryocystorhinostomy Surgery”. International Journal of Medical Science and Clinical Research Studies, vol. 2, no. 07, July 2022, pp. 631-7, doi:10.47191/ijmscrs/v2-i7-07.