RT Journal Article SR Electronic T1 A QUANTITATIVE ELECTROCARDIOGRAPHIC METHOD JF British Heart Journal JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 173 OP 179 DO 10.1136/hrt.7.4.173 VO 7 IS 4 A1 Pearson, H. E. S. A1 Gerlis, L. M. YR 1945 UL http://heart.bmj.com/content/7/4/173.abstract AB