I-Tuporn, Natakorn, Amornrat Ratanasiri, Thitima Nutravong, Kultalee Boonprasert, and Tasanee Na Pikul. 2019. “Risk Scoring System for the Prediction of Postpartum Blood Loss over 300 ML at Chiang Rai Regional Hospital”. Siriraj Medical Journal 71 (2):10-116. https://doi.org/10.33192/Smj.2019.17.