C. Wuttikul, S. Phattanasobhon, T. Suksab, P. Laohaphongsomboon, M. Ruangsuwan, and S. Sookying, “Leftover medicine among patients with non-communicable diseases in the community of Phayao province: prevalence, quantity, value, and the associated factors”, Health Sci Tech Rev, vol. 18, no. 3, pp. 33–49, Dec. 2025.