Philip Johnson - Vice President, Investor Relations
Chief Executive Officer
Great, Geoff. Thank you for the questions. Dave, if you'd like to start off on those, and then, Jan, feel free to add what you like on particularly the rate of amyloid reduction that we might expect with BACE inhibitors, what we've seen already either in pre-clinical or clinical studies. Dave?
David A. Ricks - President-Bio Medicines & Senior Vice President: Yeah, I think my part on that will be short because as we previously announced, the interim look on efficacy which triggers a move, or a safety rather, which triggers a move of the BACE inhibitor from Phase 2 to Phase 3 was predefined and really focused only on safety. We do have biomarker data on Abeta clearance. Maybe Jan can comment on here with the AZ BACE inhibitor, but we really just focused on discharging safety in a class that has had off-target safety effects. And we were pleased with the result announced earlier this month. Maybe I'll transition to Jan on the mechanistic question in Alzheimer's and then we can go back to Taltz in the EU and switching question.
Jan M. Lundberg - Executive Vice President, Science and Technology; President, Lilly Research Laboratories: Yeah, as you know, solanezumab is an antibody that has a limited penetration to the brain, about 0.1%, and it binds free amyloid beta. BACE inhibitors, on the other hand, are oral agents that better penetrate the blood/brain barrier and prevents the formation of amyloid beta from the amyloid precursor protein. No real clinical comparisons have been made then on these agents. What actually happens with the amyloid contents overall in the brain realizing that the amyloid in the brain is probably in different forms, and yes, there is plaques which are very solid, but they're also then intermittent forms and free amyloid there. I think what we have seen in pre-clinical models is that the BACE molecules can reduce the amyloid load then in the various transgenic mice models. And the effects of solanezumab in those models have been more difficult I think to demonstrate in the same way. But you know, I think overall we will have to look at the clinical data in the end. Sola [solanezumab] has a very favorable safety profile if you look overall, even than compared to some other anti-amyloid antibodies, which are in development, whilst the safety of the BACE inhibitors, particularly in larger trials, have still to be proven. And recognizing that old-age Alzheimer's patients are fragile, and you need also very safe agents. So more to come.