RT Journal Article SR Electronic T1 THE EFFECT OF EXERCISE ON LUNG DISTENSIBILITY AND RESPIRATORY WORK IN MITRAL STENOSIS JF British Heart Journal JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 303 OP 311 DO 10.1136/hrt.17.3.303 VO 17 IS 3 A1 Graham W. Hayward A1 J. M. S. Knott YR 1955 UL http://heart.bmj.com/content/17/3/303.abstract AB