Vasuthada, C. (2018). The Operational System Improvement for Service Time Reduction of Patients with Chronic Diseases, Thachang Primary Care Unit, Chanthaburi Province. Journal of Phrapokklao Nursing College, Chanthaburi, 28(1), 80–89. retrieved from https://he01.tci-thaijo.org/index.php/pnc/article/view/117872