Concerns have arisen over gastroscopies in the wake of a Singaporean patient who underwent one in South Korea. Andrea Heng and Hairianto Diman get a medical professional, Adjunct Associate Professor Lee Guan Huei, Head & Senior Consultant, Division of Gastroenterology & Hepatology, Department of Medicine, National University Hospital, to spell out the procedure and what necessitates it in the Singapore context. 

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