Key concepts for making informed choices by Aronson, J, Barends, E, Boruch, R, Brennan, M, Chalmers, I, Chislett, J, Cunliffe-Jones, P, Dahlgren, A, Gaarder, M, Haines, A, Heneghan, C, Matthews, R, Maynard, B, Oxman, A, Oxman, M, Pullin, A, Randall, N, Roddam, H, Schoonees, A, Sharples, J, Stewart, R, Stott, J, Tallis, R, Thomas, N, Vale, L