W. D. SawyerC. ThongthaiP. TapchaisriMahidol University2018-03-222018-03-221973-01-01Journal of the Medical Association of Thailand. Vol.56, No.8 (1973), 461-475012522082-s2.0-0015910502https://repository.li.mahidol.ac.th/handle/20.500.14594/10217Mahidol UniversityMedicineArticleSCOPUS