Piyachat Sakunborrirak และ Chenchit Chayachinda; Jaruda Kobkitjaroen. (2023) Association between Chemiluminescent Microparticle Immunoassay Signal-to-cutoff Ratio and Active Stage of Syphilis in Thai Pregnant Women. <i>Thai Journal of Obstetrics and Gynaecology</i>, <i>31</i>(4), 255-264.Piyachat Sakunborrirak และ Chenchit Chayachinda; Jaruda Kobkitjaroen. "Association between Chemiluminescent Microparticle Immunoassay Signal-to-cutoff Ratio and Active Stage of Syphilis in Thai Pregnant Women". Thai Journal of Obstetrics and Gynaecology 31 (2023):255-264.Piyachat Sakunborrirak และ Chenchit Chayachinda; Jaruda Kobkitjaroen. Association between Chemiluminescent Microparticle Immunoassay Signal-to-cutoff Ratio and Active Stage of Syphilis in Thai Pregnant Women. PIMDEE Co. Ltd.:ม.ป.ท. 2023.