Narong Khuntikao2011-02-242011-02-242010-03-012010-03-01Srinagarind Medical Journal (SMJ); Vol. 20 No. 3 July - September 2005; 143-149http://imsear.searo.who.int/handle/123456789/133294in PDF fileen-USAcademic Affairs, Faculty of Medicine, Khon Kaen University, KhonKaen, ThailandReview Articles