COST-EFFECTIVENESS OF THE SYSTEMATIC IDENTIFICATION AND TREATMENT OF COMORBID MAJOR DEPRESSION FOR PEOPLE WITH CHRONIC DISEASES: THE EXAMPLE OF CANCER by Walker, S, Walker, J, Richardson, G, Palmer, S, Wu, Q, Gilbody, S, Martin, P, Holm, H, Sawnhey, A, Murray, G, Sculpher, M, Sharpe, M