[1] Pfizer Med Design, Pfizer Worldwide Res & Dev, Cambridge, MA 02139 USA
[2] Univ Oxford, Ctr Med Discovery, NDM, Oxford OX37DQ, Oxon, England
[3] Pfizer Worldwide Res & Dev, Groton, CT 06340 USA
[4] Pfizer Worldwide Res & Dev, Cambridge, MA 02139 USA