1. Unitat de Farmacologia; Facultat de Medicina; Departament de Patologia i Terapèutica Experimental; Universitat de Barcelona; L'Hospitalet de Llobregat; Barcelona; Spain
2. Molecular Recognition Section; Laboratory of Bioorganic Chemistry; National Institute of Diabetes and Digestive and Kidney Diseases; National Institutes of Health; Bethesda; Maryland; USA
3. Department of Neuroscience; Karolinska Institutet; Stockholm; Sweden