*Corresponding author: Pِrof. Hossein Mozdarani, Department of Medical Genetics, School of Medical Sciences, Tarbiat Modares University, Tehran, Iran. Fax: +98 21 88006544 E-mail: [email protected] Background: Radioprotective effect of famotidine was previously shown on radiation induced micronuclei and chromosomal aberrations in human peripheral lymphocytes and mouse bone marrow cells; how...