Prawase WasiMahidol University2018-04-192018-04-191970-02-14British Medical Journal. Vol.1, No.5693 (1970), 431000714472-s2.0-84965355438https://repository.li.mahidol.ac.th/handle/20.500.14594/10585Mahidol UniversityMedicineArticleSCOPUS10.1136/bmj.1.5693.431-a