Supat SinawatKanok SeejornKriangkri Pothanan2011-02-242011-02-242010-03-272010-03-27Srinagarind Medical Journal (SMJ); Vo. 17 No. 1 January - March 2002; 26-37http://imsear.searo.who.int/handle/123456789/133435No abstracten-USAcademic Affairs, Faculty of Medicine, Khon Kaen University, KhonKaen, ThailandReview Articles