Boonyarat, R., Yongpisanpop, M., Hanchengcha, K., Boonthongpetch, N., Tabseerak, R., Philasan, S., Lertseree, S., Nuangpho, G., Paileeklee, S. and Kanato, M. 2014. Prevalence of Low Back Pain in One Month Of 40-80 Year-Old People In Sam-Lheum Community, Nai-Meung District, Amphoe Mueng, Khon Kaen. Srinagarind Medical Journal. 29, 4 (Nov. 2014), 90.