>Those PCR negative numbers are very large in all groups except the non-riba arm - interesting population in some way.<
True—the delta between the NM283+peg-ifn arm and the NM283+peg-ifn+riba arm was much larger than the typical incremental effect of ribavirin at any time point. But this is more of a curiosity item than a concern since NM283+peg-ifn will not be tested in any subsequent studies.