Relative risk factors for seropositive hepatitis E virus among blood donors and haemodialysis patients: The pivotal role of primary health care education oleh Nassir A Babiker, Adam D Abakar, Nawal T Mohamed, Nadir Abuzeid, GadAllah Modawe, Mohamed A Iesa, Sami Assil, Hisham Osman, Mohamed Hamed, Mohamed H Ahmed