Association of troponin level and age with mortality in 250 000 patients: cohort study across five UK acute care centres by Kaura, A, Panoulas, VA, Glampson, B, Davies, J, Mulla, A, Woods, K, Omigie, J, Shah, A, Channon, KM, Weber, JN, Thursz, MR, Elliott, P, Hemingway, H, Williams, B, Asselbergs, F, O’Sullivan, M, Kharbanda, R, Lord, GM, Melikian, N, Patel, RS, Perera, D, Shah, A, Francis, DP, Mayet, J