Premgamon, A.; Maskasame, S.; Kraitrakul, S.; Sungkamee, N.; Rintranurak, R.; Sangpongsanon, S.; Thothuyo, J. Health Service Utilization of the Patients under the Social Security Scheme, Newly Registered in 2004 at Srinagarind Hospital. SRIMEDJ 2013, 20, 208-214.