Circulating Genotypes of Hepatitis C Virus in Italian Patients before and after the Application of Wider Access Criteria to HCV Treatment Melanosis coli** Melanosis coli is a benign, reversible condition characterized by brown black pigmentation of the colonic mucosa, most often due to chronic use of anthraquinone laxatives. The discoloration is caused APASL consensus statements and management algorithms for hepatitis C virus infection Melanosis Coli El Atlas Gastrointestinal gastrointestinalatlas.com Nine year distribution pattern of hepatitis C virus (HCV) genotypes in Southern Italy PLOS One