Thavornwattanayong, W., Geesittisomboon, W., Jansuriyakul, W., Srinaunrod, K. and Janpen, S. 2017. Survey of Leftover Drugs and Drug Use Behavior among Patients with Chronic Diseases in Nong Pak Long, Mueang, Nakhon Pathom. Journal of Health Science of Thailand. 21, 6 (Dec. 2017), 1140–1148.