Research Article
Evaluation of the suitability of weekly peak expiratory flow rate measurements in monitoring annual decline in lung function among patients with asthma and chronic bronchitis.
P R Tirimanna, J J Den Otter, C P Van Schayck, C L Van Herwaarden, H Folgering and C Van Weel
British Journal of General Practice 1996; 46 (402): 15-18.