RT Journal Article SR Electronic T1 Reliability of PEF diaries JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 742 OP 742 DO 10.1136/thx.56.9.742 VO 56 IS 9 A1 W ANEES A1 V HUGGINS A1 P S BURGE YR 2001 UL http://thorax.bmj.com/content/56/9/742.1.abstract AB