Tang, J., X. Jun Huang, Z. Lin, Z. Huang, Y. Liu, and D. Tang. “Detection of Chlamydia trachomatis by the Polymerase Chain Reaction in the Cervices of Women with Pelvic Inflammatory Disease”. Thai Journal of Obstetrics and Gynaecology, vol. 9, no. 1, Mar. 1997, pp. 33-37, https://he02.tci-thaijo.org/index.php/tjog/article/view/257307.