Declaration of interest
RS McIntyre is the guest editor of this issue. He declares pharmaceutical income from the following; Advisory Boards: Astra Zeneca, Bristol-Myers Squibb, Janssen-Ortho, Eli Lilly, Lundbeck, Pfizer, Shire and Merck; Speakers Bureaus: Janssen-Ortho, Astra-Zeneca, Eli Lilly, Lundbeck, Merck, Pfizer and Otsuka; CME Activities: Astra Zeneca, Bristol-Myers Squibb, Physicians' Postgraduate Press, CME Outfitters, Merck, Eli Lilly, Pfizer, Lundbeck and Otsuka; Research Grants: Eli Lilly, Janssen-Ortho, Shire, Astra-Zeneca, Pfizer, Lundbeck, Forest and Sepracor.