TY - RPRT TI - Differences between supine and sitting Frank-lead electrocardiograms. AU - W Shapiro AU - A S Berson AU - H V Pipberger PY - 1976 DO - 10.1016/s0022-0736(76)80021-0 UR - https://pubmed.ncbi.nlm.nih.gov/978080/ ID - 978080 ER -