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Helbling B, Stamenic I, Viani F, Gonvers JJ, Dufour JF, Reichen J, Cathomas G, Steuerwald M, Borovicka J, Sagmeister M, Renner EL; Investigators of the Swiss Association for the Study of the Liver.Helbling B, et al. Among authors: viani f.Hepatology. 2002 Feb;35(2):447-54. doi: 10.1053/jhep.2002.31168.Hepatology. 2002.PMID: 11826422Clinical Trial.