P. SinghasivanonMahidol University2018-08-102018-08-101992-12-01The Southeast Asian journal of tropical medicine and public health. Vol.23 Suppl 1, (1992), 44-46012515622-s2.0-0026958896https://repository.li.mahidol.ac.th/handle/20.500.14594/22346Mahidol UniversityMedicineRisk and risk factors in epidemiologic studies.ArticleSCOPUS