Jarusintanakorn, S., and A. Chalermchockcharoenkit. “Prevalence of Gonorrhoeal and/or Chlamydial Infection in Hospitalized Patients with Pelvic Inflammatory Disease”. Thai Journal of Obstetrics and Gynaecology, vol. 16, no. 4, Apr. 2017, pp. 234-42, https://he02.tci-thaijo.org/index.php/tjog/article/view/82241.