“FACTORS ASSOCIATED WITH PHYSICAL ACTIVITY AMONG GRADE 4-6 STUDENTS IN NORTHERN THAILAND: Archin Songthap1, Pramote Wongsawat1, Phong-Ek Suksai2, Wanitcha Kanthasorn3and Pattama Suphunnakul1”. 2020. The Southeast Asian Journal of Tropical Medicine and Public Health 50 (5): 976-83. https://journal.seameotropmednetwork.org/index.php/jtropmed/article/view/91.