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Vikit ViranuvattiMahidol University2018-04-192018-04-191975-01-01Gastroenterology. Vol.68, No.2 (1975), 418001650852-s2.0-85025743042https://repository.li.mahidol.ac.th/handle/20.500.14594/10818Mahidol UniversityMedicineReply of the authorLetterSCOPUS10.1016/S0016-5085(75)80029-1