American Pain Society's 27th Annual Scientific Meeting (May 8 – 10, 2008): Paper Presentations: Human Disease and Models

Plasma endogenous enkephalin levels in systemic sclerosis patients
Terry A. McNearney, MD, Kathleen A. Sluka, PT, PhD, Michael Fischbach, MD, Chul Ahn, PhD and Maureen D. Mayes

More women than men experience referred pain in an experimental model of muscle pain
Laura Frey Law, PhD, Tara McMullen, Jennifer Lee, Kathleen Sluka and Thomas Graven-Nielsen, PhD

Central µ-Opioid Receptor (MOR) Availability Covaries with Mood State and Pain in Fibromyalgia (FM)
Yunhai Qiu, Jon-Kar Zubieta, David Scott, Richard Gracely, Daniel Clauw and Richard Harris

Differences in regional gray-matter density between fibromyalgia patients and controls: A voxel-based morphometry study
Michael Hsu, MD, Pia Sundgren, Richard Harris, Carlo Fernandes, Robert Welsh and Daniel Clauw

An investigation of immunologic response to negative cognition in persons with chronic pain
Beth Darnall, PhD, Heather Zwickey, PhD and William Gregory, PhD

Oral efficacy of S-norketamine in preclinical rodent pain models
Joseph Holtman, MD, PhD, Peter Crooks, Mark Kleven, Marhaba Hojahmat, Jaime Johnson, Katelyn Etscheidt and Elzbieta Wala