1. Department of Medical Biochemistry and Biophysics, Division of Molecular Neurobiology, Karolinska Institutet, 17177 Stockholm, Sweden.
2. Department of Neuroscience, Karolinska Institutet, 17177 Stockholm, Sweden.
3. Alan Edwards Centre for Research on Pain, McGill University, Montréal, Québec H3A 0G1, Canada.
4. Office of Research on Women’s Health, National Institutes of Health, Bethesda, MD 20892, USA.
5. Department of Molecular Neurosciences, Center for Brain Research, Medical University of Vienna, 1090 Vienna, Austria.