Anamika Vyas, Ramavtar Saini, & Pooja Gangrade. (2012). Prevalence of Hepatitis B Surface Antigen (HBsAg) Among HIV Seropositive Patients. Journal of Basic & Applied Sciences, 8(1), 243–246. https://doi.org/10.6000/1927-5129.2012.08.01.37