1 Pfizer Worldwide Research & Development, Neuroscience and Pain Research Unit, Cambridge, Massachusetts; Idera Pharmaceuticals, Cambridge, Massachusetts.
2 Clinical Research Institute Inc, Minneapolis, Minnesota.
3 Pfizer Worldwide Research & Development, Neuroscience and Pain Research Unit, Cambridge, Massachusetts.
4 Pfizer Worldwide Research and Development, Groton, Connecticut.
5 Pfizer Worldwide Research & Development, Neuroscience and Pain Research Unit, Cambridge, Massachusetts. Electronic address: martin.m.bednar@pfizer.com.