Udomsak Hoonwijit และผู้แต่งคนอื่นๆ. (2020) Comparison of mitragynine stability in human blood in common blood collection tubes. <i>Chulalongkorn Medical Journal</i>, <i>64</i>(4), 439-447.Udomsak Hoonwijit และผู้แต่งคนอื่นๆ. "Comparison of mitragynine stability in human blood in common blood collection tubes". Chulalongkorn Medical Journal 64 (2020):439-447.Udomsak Hoonwijit และผู้แต่งคนอื่นๆ. Comparison of mitragynine stability in human blood in common blood collection tubes. Faculty of Medicine Chulalongkorn University:ม.ป.ท. 2020.