Chaiwong, Sanhawat, Tippawan Chaiwong, Benjawan Nunthachai, and Korparakamon Sripirom. 2018. “Fluoride level in plasma blood and urine of first-trimester pregnant women living in a province”. Health Science, Science and Technology Reviews 11 (2):49-51. https://li01.tci-thaijo.org/index.php/journalup/article/view/184739.