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Ket SN, Mangira D, Ng A, Tjandra D, Koo JH, La Nauze R, Metz A, Moss A, Brown G.Ket SN, et al. Among authors: metz a.JGH Open. 2019 Aug 18;4(2):172-177. doi: 10.1002/jgh3.12243. eCollection 2020 Apr.JGH Open. 2019.PMID: 32280761Free PMC article.