The Prevalence of Hepatitis B Virus Surface Antigen (HBsAg) Variations and Correlation with the Clinical and Serologic Pictures in Chronic Carriers from Khorasan Province, North-East of Iran - Ghaziasadi, Azam; Ziaee, Masoud; Norouzi, Mehdi; Malekzadeh, Reza; Alavian, Seyed Moayed; Saberfar, Esmaeil; Judaki, Mohammad Ali; Ghamari, Shiva; Khedive, Abolfazl; Namazi, Alireza; Rahimnia, Ramin; Jazayeri, Seyed Mohammad (Acta Medica Iranica)