Patrachai , S., Taneepanichskul, S., Intaraprasert , S., O-Prasertsawat, P., & Pongthai , S. (1997). A Survey of Postpartum Morbidity in Ramathibodi Hospital. Thai Journal of Obstetrics and Gynaecology, 9(3), 183–187. retrieved from https://he02.tci-thaijo.org/index.php/tjog/article/view/257246