Coulton, Simon, Watson, Jude, Bland, Martin, Drummond, Colin, Kaner, Eileen, Godfrey, Christine, Hassey, Alan, Morton, Veronica, Parrott, Steve, Phillips, Tom, Raistrick, Duncan, Rumball, Daphne, Tober, Gillian, "The effectiveness and cost-effectiveness of opportunistic screening and stepped care interventions for older hazardous alcohol users in primary care (AESOPS) – A randomised control trial protocol", BMC Health Services Research, 2008