TY - JOUR T1 - Risks and benefits of β-blockade JF - Canadian Medical Association Journal JO - CMAJ SP - 14 LP - 14-a DO - 10.1503/cmaj.1041425 VL - 172 IS - 1 AU - Stephen R. Workman Y1 - 2005/01/04 UR - http://www.cmaj.ca/content/172/1/14.2.abstract ER -