Dept. of Pharmaceutical Sciences University of Modena & Reggio Emilia Via Campi, 183 41100 Modena, Italy

Dept. of Physiology & Pharmacology, College of Veterinary Medicine, University of Georgia Athens, GA 30602, USA

Dept. of Physiology & Pharmacology Wake Forest University School of Medicine Medical Center Boulevard Winston-Salem, NC 27157-1083, USA

Endocannabinoid Research Group Instituto di Chimica Biomolecolare Consiglio Nazionale delle Ricerche Via Campi Flegrei 34 Comprensorio Olivetti, Fabbr. 70 80078, Pozzuoli, Napoli, Italy

Tulane University Medical School 1430 Tulane Avenue SL-2 New Orleans, LA 70112, USA

Dept. of Pharmacology & Toxicology University of Texas Medical Branch Galveston, TX 77555, USA

Dept. of Psychiatry University of California, San Diego, San Diego, CA 92103 USA

National Institutes of Health National Institute on Drug Abuse 5500 Nathan Shock Drive Triad Building, Room 3301 Baltimore, MD 21224, USA

Dept. of Chemistry University of North Carolina at Wilmington Wilmington, NC 28403, USA

Dept. of Physiology & Neuroscience Medical University of South Carolina 173 Ashley Avenue-BSB 403 Charleston, SC 29425, USA

Dept. of Experimental & Environmental Medicine & Medical Biotechnologies University of Milano-Bicocca Via Cadore 48 20052 Monza, Italy

Dept. of Pharmacology University of Pittsburgh W1351 Biomedical Science Tower Pittsburgh, PA 15261, USA

Dept. of Veterinary Comparative Anatomy, Physiology & Pharmacology College of Veterinary Medicine Washington State University Pullman, WA 99164, USA

Department of Pharmacology, Emory University School of Medicine, Rollins Research Center, Atlanta, Georgia, USA

Dept. of Neurology, Neurosciences Center All India Institute of Medical Sciences New Delhi, 110 029 India

Vollum Institute of Biomedical Research Oregon Health Sciences University 3181 SW Sam Jackson Park Road Portland, OR 97201, USA

Department of Medicine, McMaster University, Hamilton, Ontario, L8N3Z5, Canada