Kovit Khampitak2011-02-242011-02-242010-03-062010-03-06Srinagarind Medical Journal (SMJ); Vo. 19 No. 3 July - September 2004; 162-166http://imsear.searo.who.int/handle/123456789/133342No abstracten-USAcademic Affairs, Faculty of Medicine, Khon Kaen University, KhonKaen, ThailandReview Articles