Amornchokkulphan, A. (2025). Development of a methadone service model in the Drug Use Harm Reduction Center (Drop-in center) in Chiang Rai Province: Research and Development. Suranaree Journal of Health Science, 3(2), e04335(1–16). retrieved from https://he03.tci-thaijo.org/index.php/SJHSci/article/view/4335