![Andrology: Deleterious effects of khat addiction on semen parameters and sperm ultrastructure]()
Andrology: Deleterious effects of khat addiction on semen parameters and sperm ultrastructureEl-Shoura, S. M.; Aziz, M. A.; Ali, M. E.; El-Said, M. M.; Ali, K. Z. M.; Kemeir, M. A.; Raoof, A. M. S.; Allam, M.; Elmalik, E. M. A. · Human Reproduction · 1995