DIARRA, Birama, et al. “OCCULT HEPATITIS B VIRUS INFECTION AND ASSOCIATED GENOTYPES AMONG HBSAG-NEGATIVE SUBJECTS IN BURKINA FASO”. Mediterranean Journal of Hematology and Infectious Diseases, vol. 10, no. 1, Jan. 2018, p. e2018007, doi:10.4084/mjhid.2018.007.