aUniversity of Washington, Seattle, WA 98195, USA
bUniversity of Rochester School of Medicine and Dentistry, Rochester, NY, USA
cUnited States Food and Drug Administration, Rockville, MD, USA
dNorthwestern University, Chicago, IL, USA
eJohnson and Johnson, Raritan, NY, USA
fAstraZeneca, Wilmington, DE, USA
gUniversity of California San Diego, La Jolla, CA, USA
hMerck and Company, Blue Bell, PA, USA
iUniversity of Texas, M.D. Anderson Cancer Center, USA
jAmerican Chronic Pain Association, Rocklin, CA, USA
kAllergan, Inc, Irvine, CA, USA
lNational Institute of Dental and Craniofacial Research, Bethesda, MD, USA
mUniversity of Pennsylvania, Philadelphia, PA, USA
nJohns Hopkins University, Baltimore, MD, USA
oUniversity Health Network and University of Toronto, Toronto, Canada
pNovartis Pharmaceuticals, East Hanover, NJ, USA
qVA Connecticut Healthcare System, West Haven, CT, USA
rYale University, New Haven, CT, USA
sCelgene Corporation, Warren, NJ, USA
tPfizer Global Research and Development, Ann Arbor, MI, USA
uDalhousie University, Halifax, Nova Scotia, Canada
vLondon Regional Cancer Centre, London, Ont., Canada
wUniversity of Liverpool, Liverpool, UK
xGlaxoSmithKline, Research Triangle Park, NC, USA
yJohnson & Johnson, Raritan, NJ, USA
zAlpharma, Elizabeth, NJ, USA
aaHarvard Medical School, Boston, MA, USA
abAlpharma, Piscataway, NY, USA
acUniversity of Munich, Munich, Germany
adUS Department of Veterans Affairs, Washington, DC, USA
aeNeurogesX, Inc, San Carlos, CA, USA
afEli Lilly and Co., Indianapolis, IN, USA
agEndo Pharmaceuticals Inc., Chadds Ford, PA, USA
ahSt. Thomas Hospital, London, UK
aiSaint Louis University, St. Louis, MO, USA
*Corresponding author. Tel.: +1 206 616 2626; fax: +1 206 543 2958.
1Present address: Wyeth, Madison, NJ, USA.
2Present address: The National Institute of Nursing Research, Bethesda, MD, USA.
3Present address: Wyeth Consumer Healthcare, Madison, NJ, USA.
4Present address: Johnson and Johnson, Titusville, NJ, USA.
5Present address: Solstice Neurosciences, Malvern, PA, USA.
6Present address: Alpharma, Piscataway, NJ, USA.
7Present address: Tercica, Brisbane, CA, USA.
Submitted January 9, 2006; revised May 22, 2006; accepted September 18, 2006.