Lumbiganon, Pisake, Yupa Urwijitaroon, Pensri Kowsuwan, Pagakrong Lumbiganon, Manat Panamonta, and Tassanee Sookpranee. 1989. “Prevention of Vertical Transmission of Hepatitis B Virus A Randomized Clinical Trial and A Cost - Effectiveness Analysis”. Thai Journal of Obstetrics and Gynaecology 1 (2). Bangkok, Thailand:123-27. https://he02.tci-thaijo.org/index.php/tjog/article/view/257907.