Supat Sinawat2011-02-242011-02-242010-04-102010-04-10Srinagarind Medical Journal (SMJ); Vo. 15 No. 2 April - June 2000; 100-106http://imsear.searo.who.int/handle/123456789/133569no abstracten-USAcademic Affairs, Faculty of Medicine, Khon Kaen University, KhonKaen, ThailandReview Articles