Katharine Herrick-Davis is Professor of Neuroscience and Experimental Therapeutics at Albany Medical College, Albany, USA. Her research has focused on investigating receptor dimerization and how it affects receptor function using the 5-HT2C receptor as a model system. Graeme Milligan is Professor of Molecular Pharmacology, University of Glasgow, U.K. he is the Dean of Research, College of Medical, Veterinary and Life Sciences, University of Glasgow. His main research group centres on the function, structure and regulation of GPCRs and their interacting proteins. Giuseppe Di Giovanni is Professor of Human Physiology, University of Malta, Malta. He is the President of the Malta Neuroscience Network and Treasurer of the Mediterranean Neuroscience Society. His research has focused on the pathophysiology of the monoaminergic systems in different neuropsychiatric disorders, such as Parkinson's disease, depression, drug of abuse and epilepsy.