1. This study will include patients greater than or equal to 18 years of age with chronic Hepatitis C, all genotypes, including naïve and experimented (null or partial) responders, intolerant to interferon (IFN) with or without cirrhosis, HIV/HCV coinfection, and liver transplant recipients at the sentinel sites, who received at least 1 dose of daclatasvir for the treatment of chronic Hepatitis C during the specified 24-month study period.