TY - JOUR T1 - Necessary cautions when considering digoxin in heart failure JF - Canadian Medical Association Journal JO - CMAJ SP - 644 LP - 645 DO - 10.1503/cmaj.061309 VL - 176 IS - 5 AU - George A. Heckman AU - Robert S. McKelvie Y1 - 2007/02/27 UR - http://www.cmaj.ca/content/176/5/644.abstract ER -