Merck (MRK) announced it has entered into a non-exclusive agreement with Bristol-Myers Squibb (BMY) to conduct a Phase II clinical trial to evaluate the safety and efficacy of a once-daily oral combination regimen consisting of Bristol-Myers Squibb’s investigational NS5A replication complex inhibitor daclatasvir and Merck's investigational NS3/4A protease inhibitor MK-5172 for the treatment of chronic hepatitis C virus infection, genotype 1. The planned initiation of the Phase II clinical trial follows the completion of a Phase I safety evaluation of the investigational combination regimen. Under the agreement, Merck will conduct the Phase II clinical trial. Further clinical development activities beyond the Phase II study are not covered as part of this agreement. Additional details of the collaboration were not disclosed.