I-Tuporn, N., Ratanasiri, A., Nutravong, T., Boonprasert, K., & Na Pikul, T. (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