Ponmark J, Thisara P, Lamsri S. Development of a Participatory Model for Promoting Early Childhood Development by Grandparent Caregivers: A Case Study of Huai Yang Kham Child Development Center, Chun District, Phayao Province. J. Nurs. Public. Health. Res. [internet]. 2026 Jul. 14 [cited 2026 Sep. 11];6(2):e280175. available from: https://he02.tci-thaijo.org/index.php/jnphr/article/view/280175