Background Immortalized cell lines have been used extensively in cancer biology and as a model system to test the efficacy of vaccines, but their use is becoming increasingly limited because of extensive genetic and phenotypic variations compared to those expressed in cancer patients. Similarly
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South Africa harbours the highest number of rape incidents in the world, and sexual assault and rape cases in the entire SADC region are estimated at a minimum of 55 000 cases per year. Crime scene investigations utilise DNA technology on a regular basis. In cases of rape or sexual abuse, male