Balthip, K. and Atiwiwat, D. 2026. Effects of a Gratitude-Promoting Program on Purpose in Life and Heart Rate Variability among Vulnerable Thai Youth: A Quasi-Experimental Study. Pacific Rim International Journal of Nursing Research. 30, 4 (Sep. 2026), 995–1015. DOI:https://doi.org/10.60099/prijnr.2026.279654.