The latest info on Presidio’s PPI-668 (an NS5A inhibitor) are the 3-day monotherapy data reported in Jun 2012 (#msg-76993511).Not sure off-hand how that compares to NS5A 3-day data from others. All told, therefore, combining these two HCV drugs does not exactly seem like a winning formula for commercial success.What's that saying of yours? Something about two turkeys? ; )