EFFECTIVENESS OF ROUTINE SELF-MONITORING OF PEAK FLOW IN PATIENTS WITH ASTHMA - Drummond, N; Abdalla, M; Beattie, J; Buckingham, J; Lindsay, T; Osman, L; Ross, S; Roychaudhury, A; Russell, L; Turner, M; Friend, J; Legge, J; et al. (BRITISH MEDICAL JOURNAL, 1994)