Rattanaphongset P, Bosittipichet T, Nakawiro P. Factors Associated with Insomnia Symptoms among Elderly in Primary Care Unit. JPMAT [internet]. 2021 May 17 [cited 2026 Aug. 28];11(1):188-201. available from: https://he01.tci-thaijo.org/index.php/JPMAT/article/view/247246