Primary Endpoint Safety and tolerability of sofosbuvir/ledipasvir or sofosbuvir/ribavirin in subjects with B-cell non-Hodgkin's lymphoma will be assessed by number of adverse events and serious adverse events. In addition, the study will assess the number of subjects who had to stop treatment due to adverse events or serious adverse events. The study will also examine the number of subjects in which treatment for lymphoma had to be given due to clinical progression.