Sami Ali Mohamed Ibrahim GabrDr. Sami Gabr is a Research Associate, Electron Microscope Unit, Fac. of Medicine, Mansoura Univ.,Egypt.Currently, he is a researcher in Rehabilitation Research Chair,king Saud Univ.,KSA.He received BSc(Botany/Chemistry),Diploma(Applied Microbiology), MSc and PhD(Biochemistry/Molecular biology)from Mansoura Univ.