Clayton, D; Campbell, MJ; Longford, NT; Armstrong, B; Richardson, S; Rushton, L; Raab, GM; Quinn, M; Nelder, JA; Bland, M; Macfarlane, A; Dryden, IL; Smith, RI; Berhane, K; Thomas, DC; Cotton, JW; Coull, BA; Mezzetti, M; Ryan, LM; Cowles, K; Cox, C; Cox, LH; Gupta, S; Hosmane, BS; Gurrin, LC; Pettitt, AN; Saez, M; Sheppard, L; Lumley, T