S. SahaphongMahidol University2018-06-012018-06-011978-12-01Southeast Asian Journal of Tropical Medicine and Public Health. Vol.9, No.2 (1978), 133-141003836192-s2.0-0018087399https://repository.li.mahidol.ac.th/handle/20.500.14594/13082Mahidol UniversityMedicineArticleSCOPUS