Pongsuthirak, P., Vutyavanich, T., Apichartpiyakul, C., Vithayasai, V. and Piromiertamorn, W. 1995. Seroprevalence of Human Immunodeficiency Virus in Patients with Ectopic Pregnancies . Thai Journal of Obstetrics and Gynaecology. 7, 2 (Jul. 1995), 123–129.