Banafa, Amal Mohammed, Wadhah Hassan Edrees, Ghada Hassein Al-Falahi, و Wadee Abdullah Al-Shehari. 2022. "Prevalence of Hepatitis B Surface Antigen Among Orphans Children Living in Orphanage in Sana’a City, Yemen". PSM Microbiology 7 (1):19-26. https://psmjournals.org/index.php/microbiol/article/view/626.