Outcome measures in a combined exercise rehabilitation programme for COPD and chronic heart failure patients: a stakeholder consensus event - Jones, A; Evans, R; Man, W; bolton, C; breen, S; doherty, P; gardiner, N; Houchen-, Wolloff L; hurst, J; maddocks, M; Quint, J; jolly, K; et al. (Chronic Respiratory Disease, 2019)