1. Newly acquired left bundle branch block: the Framingham study;Schneider;Ann Intern Med,1979
2. Introduction and general background;Gordon,1968
3. Electrocardiography: Fundamentals and Clinical Application;Wolff,1956
4. Electrocardiography in Clinical Practice;Chou,1979
5. Means at each examination and interexamination variation of specified characteristics: Framingham study, exam 1 to exam 10;Gordon,1973