Duke University Medical Center, Durham, NC, USAJ. N. LibermanIMR, an AdvancePCS Company, Hunt Valley, MD, USAP. WilliamsPAREXEL International, Uxbridge, Middlesex, UKTaylor And FrancisCurrent Medical Research & OpinionLipton RB, Cutrer FM, Goadsby PJ, Ferrari MD, Dodick DW, McCrory D, ...