Zainal Abidin, Norsheila, et al. “Financial Impact and Causes of Chronic Musculoskeletal Disease Cases in Malaysia Based on Social Security Organization of Malaysia Claims Record”. International Journal of Engineering and Technology, vol. 7, no. 3.24, Aug. 2018, pp. 23-27, https://doi.org/10.14419/ijet.v7i3.24.17295.