Nicholas RieslandAndrew J H SimpsonHenry WildeU.S. Department of StateMahidol UniversityNuffield Department of Clinical MedicineChulalongkorn UniversityFPO2018-09-072018-09-072001-07-07Journal of Travel Medicine. Vol.8, No.3 (2001), 146-147119519822-s2.0-0034972882https://repository.li.mahidol.ac.th/handle/123456789/26741Mahidol UniversityMedicineArticleSCOPUS