GENERAL Asian Pacific Journal of Tropical Biomedicine is sponsored by Asian Pacific Tropical Medicine Press and aims to set up an academic communicating platform for Chinese and scientists all over the world on tropical biomedicine and related sciences.The Journal invites concise reports of original research in all areas of tropical biomedicine and related fields both experimental and clinical.including modern,traditional and epidemiologieal studies,from any part of the world.Review articles based primarily on authors’own research on internationally important topics will be accepted.Short communications and letters to the editor are also welcome.Authors are requested to submit a covering letter indicating that their manuscript represents original unpublished material that has not been and will not be published elsewhere(il accepted).This restriction does not apply to results published as abstracts of communications,letters to the editor or as preliminary reports.By submitting a manuscript the authors warrant that they have obtained permission to use any copyrighted or previously published materials. GENERAL Asian Pacific Journal of Tropical Biomedicine is sponsored by Asian Pacific Tropical Medicine Press and aims to set up an academic communicating platform for Chinese and scientists all over the world on tropical biomedicine and related sciences.The Journal invites concise reports of original research in all areas of tropical biomedicine and related fields both experimental and clinical .including modern, traditional and epidemiologieal studies, from any part of the world. Review articles based primarily on authors’own research on important papers will be accepted. Short communications and letters to the editor are also welcome.Authors are requested to submit a covering letter indicating that their manuscript示 original unpublished material that has not been and will not be published elsewhere (il accepted). This restriction does not apply to results published as abstracts of communications, letters to the editor or as preliminary reports.By submitting a manuscr ipt the authors warrant that they have obtained permission to use any copyrighted or previously published materials.