We are researchers who have published analyses of nucleic acid sequence variation of hepatitis C virus (HCV) and associated virological and clinical significance. We are concerned that our investigations are hampered by the lack of a consensus nomenclature for variants of HCV and that this leads to confusion when results from different laboratories are compared. Furthermore, because there are no consistently applied criteria by which new genotypes are defined, investigators assign new type descriptions to novel sequence variants on an ad hoc basis without agreement from

In a genome-wide association study, we associated AIH type 1 with variants in the major histocompatibility complex region, and identified variants of SH2B3and CARD10 as likely risk factors. These findings support a complex genetic basis for AIH pathogenesis and indicate that part of the genetic susceptibility overlaps with that for other immune-mediated liver diseases.

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